Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

3 files changed, 440 insertions, 0 deletions

diff --git a/arch/mips/mips-boards/malta/Makefile b/arch/mips/mips-boards/malta/Makefile
new file mode 100644
index 00000000000..fd4c143c0e2
--- /dev/null
+++ b/arch/mips/mips-boards/malta/Makefile
@@ -0,0 +1,22 @@
+#
+# Carsten Langgaard, carstenl@mips.com
+# Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+#
+# This program is free software; you can distribute it and/or modify it
+# under the terms of the GNU General Public License (Version 2) as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+#
+# Makefile for the MIPS Malta specific kernel interface routines
+# under Linux.
+#
+
+obj-y := malta_int.o malta_setup.o
diff --git a/arch/mips/mips-boards/malta/malta_int.c b/arch/mips/mips-boards/malta/malta_int.c
new file mode 100644
index 00000000000..dd2db35966b
--- /dev/null
+++ b/arch/mips/mips-boards/malta/malta_int.c
@@ -0,0 +1,187 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
+ * Copyright (C) 2001 Ralf Baechle
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Routines for generic manipulation of the interrupts found on the MIPS
+ * Malta board.
+ * The interrupt controller is located in the South Bridge a PIIX4 device
+ * with two internal 82C95 interrupt controllers.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/random.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/mips-boards/malta.h>
+#include <asm/mips-boards/maltaint.h>
+#include <asm/mips-boards/piix4.h>
+#include <asm/gt64120.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/mips-boards/msc01_pci.h>
+
+extern asmlinkage void mipsIRQ(void);
+
+static DEFINE_SPINLOCK(mips_irq_lock);
+
+static inline int mips_pcibios_iack(void)
+{
+	int irq;
+        u32 dummy;
+
+	/*
+	 * Determine highest priority pending interrupt by performing
+	 * a PCI Interrupt Acknowledge cycle.
+	 */
+	switch(mips_revision_corid) {
+	case MIPS_REVISION_CORID_CORE_MSC:
+	case MIPS_REVISION_CORID_CORE_FPGA2:
+	case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+	        MSC_READ(MSC01_PCI_IACK, irq);
+		irq &= 0xff;
+		break;
+	case MIPS_REVISION_CORID_QED_RM5261:
+	case MIPS_REVISION_CORID_CORE_LV:
+	case MIPS_REVISION_CORID_CORE_FPGA:
+	case MIPS_REVISION_CORID_CORE_FPGAR2:
+		irq = GT_READ(GT_PCI0_IACK_OFS);
+		irq &= 0xff;
+		break;
+	case MIPS_REVISION_CORID_BONITO64:
+	case MIPS_REVISION_CORID_CORE_20K:
+	case MIPS_REVISION_CORID_CORE_EMUL_BON:
+		/* The following will generate a PCI IACK cycle on the
+		 * Bonito controller. It's a little bit kludgy, but it
+		 * was the easiest way to implement it in hardware at
+		 * the given time.
+		 */
+		BONITO_PCIMAP_CFG = 0x20000;
+
+		/* Flush Bonito register block */
+		dummy = BONITO_PCIMAP_CFG;
+		iob();    /* sync */
+
+		irq = *(volatile u32 *)(_pcictrl_bonito_pcicfg);
+		iob();    /* sync */
+		irq &= 0xff;
+		BONITO_PCIMAP_CFG = 0;
+		break;
+	default:
+	        printk("Unknown Core card, don't know the system controller.\n");
+		return -1;
+	}
+	return irq;
+}
+
+static inline int get_int(int *irq)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mips_irq_lock, flags);
+
+	*irq = mips_pcibios_iack();
+
+	/*
+	 * IRQ7 is used to detect spurious interrupts.
+	 * The interrupt acknowledge cycle returns IRQ7, if no
+	 * interrupts is requested.
+	 * We can differentiate between this situation and a
+	 * "Normal" IRQ7 by reading the ISR.
+	 */
+	if (*irq == 7)
+	{
+		outb(PIIX4_OCW3_SEL | PIIX4_OCW3_ISR,
+		     PIIX4_ICTLR1_OCW3);
+		if (!(inb(PIIX4_ICTLR1_OCW3) & (1 << 7))) {
+			spin_unlock_irqrestore(&mips_irq_lock, flags);
+			printk("We got a spurious interrupt from PIIX4.\n");
+			atomic_inc(&irq_err_count);
+			return -1;    /* Spurious interrupt. */
+		}
+	}
+
+	spin_unlock_irqrestore(&mips_irq_lock, flags);
+
+	return 0;
+}
+
+void malta_hw0_irqdispatch(struct pt_regs *regs)
+{
+	int irq;
+
+	if (get_int(&irq))
+	        return;  /* interrupt has already been cleared */
+
+	do_IRQ(irq, regs);
+}
+
+void corehi_irqdispatch(struct pt_regs *regs)
+{
+        unsigned int data,datahi;
+
+	/* Mask out corehi interrupt. */
+	clear_c0_status(IE_IRQ3);
+
+        printk("CoreHI interrupt, shouldn't happen, so we die here!!!\n");
+        printk("epc   : %08lx\nStatus: %08lx\nCause : %08lx\nbadVaddr : %08lx\n"
+, regs->cp0_epc, regs->cp0_status, regs->cp0_cause, regs->cp0_badvaddr);
+        switch(mips_revision_corid) {
+        case MIPS_REVISION_CORID_CORE_MSC:
+        case MIPS_REVISION_CORID_CORE_FPGA2:
+	case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+                break;
+        case MIPS_REVISION_CORID_QED_RM5261:
+        case MIPS_REVISION_CORID_CORE_LV:
+        case MIPS_REVISION_CORID_CORE_FPGA:
+        case MIPS_REVISION_CORID_CORE_FPGAR2:
+                data = GT_READ(GT_INTRCAUSE_OFS);
+                printk("GT_INTRCAUSE = %08x\n", data);
+                data = GT_READ(GT_CPUERR_ADDRLO_OFS);
+                datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
+                printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, data);
+                break;
+        case MIPS_REVISION_CORID_BONITO64:
+        case MIPS_REVISION_CORID_CORE_20K:
+        case MIPS_REVISION_CORID_CORE_EMUL_BON:
+                data = BONITO_INTISR;
+                printk("BONITO_INTISR = %08x\n", data);
+                data = BONITO_INTEN;
+                printk("BONITO_INTEN = %08x\n", data);
+                data = BONITO_INTPOL;
+                printk("BONITO_INTPOL = %08x\n", data);
+                data = BONITO_INTEDGE;
+                printk("BONITO_INTEDGE = %08x\n", data);
+                data = BONITO_INTSTEER;
+                printk("BONITO_INTSTEER = %08x\n", data);
+                data = BONITO_PCICMD;
+                printk("BONITO_PCICMD = %08x\n", data);
+                break;
+        }
+
+        /* We die here*/
+        die("CoreHi interrupt", regs);
+}
+
+void __init arch_init_irq(void)
+{
+	set_except_vector(0, mipsIRQ);
+	init_i8259_irqs();
+}
diff --git a/arch/mips/mips-boards/malta/malta_setup.c b/arch/mips/mips-boards/malta/malta_setup.c
new file mode 100644
index 00000000000..3377e66de9e
--- /dev/null
+++ b/arch/mips/mips-boards/malta/malta_setup.c
@@ -0,0 +1,231 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/tty.h>
+
+#ifdef CONFIG_MTD
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#endif
+
+#include <asm/cpu.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/mips-boards/prom.h>
+#include <asm/mips-boards/malta.h>
+#include <asm/mips-boards/maltaint.h>
+#include <asm/dma.h>
+#include <asm/time.h>
+#include <asm/traps.h>
+#ifdef CONFIG_VT
+#include <linux/console.h>
+#endif
+
+extern void mips_reboot_setup(void);
+extern void mips_time_init(void);
+extern void mips_timer_setup(struct irqaction *irq);
+extern unsigned long mips_rtc_get_time(void);
+
+#ifdef CONFIG_KGDB
+extern void kgdb_config(void);
+#endif
+
+struct resource standard_io_resources[] = {
+	{ "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
+	{ "timer", 0x40, 0x5f, IORESOURCE_BUSY },
+	{ "keyboard", 0x60, 0x6f, IORESOURCE_BUSY },
+	{ "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY },
+	{ "dma2", 0xc0, 0xdf, IORESOURCE_BUSY },
+};
+
+#ifdef CONFIG_MTD
+static struct mtd_partition malta_mtd_partitions[] = {
+	{
+		.name =		"YAMON",
+		.offset =	0x0,
+		.size =		0x100000,
+		.mask_flags =	MTD_WRITEABLE
+	},
+	{
+		.name =		"User FS",
+		.offset = 	0x100000,
+		.size =		0x2e0000
+	},
+	{
+		.name =		"Board Config",
+		.offset =	0x3e0000,
+		.size =		0x020000,
+		.mask_flags =	MTD_WRITEABLE
+	}
+};
+
+#define number_partitions	(sizeof(malta_mtd_partitions)/sizeof(struct mtd_partition))
+#endif
+
+const char *get_system_type(void)
+{
+	return "MIPS Malta";
+}
+
+#ifdef CONFIG_BLK_DEV_FD
+void __init fd_activate(void)
+{
+	/*
+	 * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
+	 * Controller.
+	 * Done by YAMON 2.00 onwards
+	 */
+	/* Entering config state. */
+	SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
+
+	/* Activate floppy controller. */
+	SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
+	SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
+	SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
+	SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
+
+	/* Exit config state. */
+	SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
+}
+#endif
+
+static int __init malta_setup(void)
+{
+	unsigned int i;
+
+	/* Request I/O space for devices used on the Malta board. */
+	for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+		request_resource(&ioport_resource, standard_io_resources+i);
+
+	/*
+	 * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
+	 */
+	enable_dma(4);
+
+#ifdef CONFIG_KGDB
+	kgdb_config ();
+#endif
+
+	if ((mips_revision_corid == MIPS_REVISION_CORID_BONITO64) ||
+	    (mips_revision_corid == MIPS_REVISION_CORID_CORE_20K) ||
+	    (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL_BON)) {
+		char *argptr;
+
+		argptr = prom_getcmdline();
+		if (strstr(argptr, "debug")) {
+			BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
+			printk ("Enabled Bonito debug mode\n");
+		}
+		else
+			BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
+
+#ifdef CONFIG_DMA_COHERENT
+		if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
+			BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
+			printk("Enabled Bonito CPU coherency\n");
+
+			argptr = prom_getcmdline();
+			if (strstr(argptr, "iobcuncached")) {
+				BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
+				BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & 
+					~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
+					  BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+				printk("Disabled Bonito IOBC coherency\n");
+			}
+			else {
+				BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
+				BONITO_PCIMEMBASECFG |= 
+					(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | 
+					 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
+				printk("Disabled Bonito IOBC coherency\n");
+			}
+		}
+		else
+			panic("Hardware DMA cache coherency not supported");
+
+#endif
+	}
+#ifdef CONFIG_DMA_COHERENT
+	else {
+		panic("Hardware DMA cache coherency not supported");
+	}
+#endif
+
+#ifdef CONFIG_BLK_DEV_IDE
+	/* Check PCI clock */
+	{
+		int jmpr = (*((volatile unsigned int *)ioremap(MALTA_JMPRS_REG, sizeof(unsigned int))) >> 2) & 0x07;
+		static const int pciclocks[] __initdata = {
+			33, 20, 25, 30, 12, 16, 37, 10
+		};
+		int pciclock = pciclocks[jmpr];
+		char *argptr = prom_getcmdline();
+
+		if (pciclock != 33 && !strstr (argptr, "idebus=")) {
+			printk("WARNING: PCI clock is %dMHz, setting idebus\n", pciclock);
+			argptr += strlen(argptr);
+			sprintf (argptr, " idebus=%d", pciclock);
+			if (pciclock < 20 || pciclock > 66)
+				printk ("WARNING: IDE timing calculations will be incorrect\n");
+		}
+	}
+#endif
+#ifdef CONFIG_BLK_DEV_FD
+	fd_activate ();
+#endif
+#ifdef CONFIG_VT
+#if defined(CONFIG_VGA_CONSOLE)
+	screen_info = (struct screen_info) {
+		0, 25,			/* orig-x, orig-y */
+		0,			/* unused */
+		0,			/* orig-video-page */
+		0,			/* orig-video-mode */
+		80,			/* orig-video-cols */
+		0,0,0,			/* ega_ax, ega_bx, ega_cx */
+		25,			/* orig-video-lines */
+		VIDEO_TYPE_VGAC,	/* orig-video-isVGA */
+		16			/* orig-video-points */
+	};
+#endif
+#endif
+
+#ifdef CONFIG_MTD
+	/*
+	 * Support for MTD on Malta. Use the generic physmap driver
+	 */
+	physmap_configure(0x1e000000, 0x400000, 4, NULL);
+	physmap_set_partitions(malta_mtd_partitions, number_partitions);
+#endif
+
+	mips_reboot_setup();
+
+	board_time_init = mips_time_init;
+	board_timer_setup = mips_timer_setup;
+	rtc_get_time = mips_rtc_get_time;
+
+	return 0;
+}
+
+early_initcall(malta_setup);