Linux-2.6.12-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, 253 insertions, 0 deletions

diff --git a/arch/mips/gt64120/common/Makefile b/arch/mips/gt64120/common/Makefile
new file mode 100644
index 000000000000..eba5051015a5
--- /dev/null
+++ b/arch/mips/gt64120/common/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for common code of gt64120-based boards.
+#
+
+obj-y	 		+= time.o
+obj-$(CONFIG_PCI)	+= pci.o
diff --git a/arch/mips/gt64120/common/pci.c b/arch/mips/gt64120/common/pci.c
new file mode 100644
index 000000000000..e9e5419a0d53
--- /dev/null
+++ b/arch/mips/gt64120/common/pci.c
@@ -0,0 +1,147 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ * Galileo Evaluation Boards PCI support.
+ *
+ * The general-purpose functions to read/write and configure the GT64120A's
+ * PCI registers (function names start with pci0 or pci1) are either direct
+ * copies of functions written by Galileo Technology, or are modifications
+ * of their functions to work with Linux 2.4 vs Linux 2.2.  These functions
+ * are Copyright - Galileo Technology.
+ *
+ * Other functions are derived from other MIPS PCI implementations, or were
+ * written by RidgeRun, Inc,  Copyright (C) 2000 RidgeRun, Inc.
+ *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <asm/gt64120.h>
+
+#define SELF 0
+
+/*
+ * pciXReadConfigReg  - Read from a PCI configuration register
+ *                    - Make sure the GT is configured as a master before
+ *                      reading from another device on the PCI.
+ *                   - The function takes care of Big/Little endian conversion.
+ * INPUTS:   regOffset: The register offset as it apears in the GT spec (or PCI
+ *                        spec)
+ *           pciDevNum: The device number needs to be addressed.
+ * RETURNS: data , if the data == 0xffffffff check the master abort bit in the
+ *                 cause register to make sure the data is valid
+ *
+ *  Configuration Address 0xCF8:
+ *
+ *       31 30    24 23  16 15  11 10     8 7      2  0     <=bit Number
+ *  |congif|Reserved|  Bus |Device|Function|Register|00|
+ *  |Enable|        |Number|Number| Number | Number |  |    <=field Name
+ *
+ */
+static unsigned int pci0ReadConfigReg(int offset, struct pci_dev *device)
+{
+	unsigned int DataForRegCf8;
+	unsigned int data;
+
+	DataForRegCf8 = ((PCI_SLOT(device->devfn) << 11) |
+			 (PCI_FUNC(device->devfn) << 8) |
+			 (offset & ~0x3)) | 0x80000000;
+	GT_WRITE(GT_PCI0_CFGADDR_OFS, DataForRegCf8);
+
+	/*
+	 * The casual observer might wonder why the READ is duplicated here,
+	 * rather than immediately following the WRITE, and just have the swap
+	 * in the "if".  That's because there is a latency problem with trying
+	 * to read immediately after setting up the address register.  The "if"
+	 * check gives enough time for the address to stabilize, so the READ
+	 * can work.
+	 */
+	if (PCI_SLOT(device->devfn) == SELF)	/* This board */
+		return GT_READ(GT_PCI0_CFGDATA_OFS);
+	else		/* PCI is little endian so swap the Data. */
+		return __GT_READ(GT_PCI0_CFGDATA_OFS);
+}
+
+/*
+ * pciXWriteConfigReg - Write to a PCI configuration register
+ *                    - Make sure the GT is configured as a master before
+ *                      writingto another device on the PCI.
+ *                    - The function takes care of Big/Little endian conversion.
+ * Inputs:   unsigned int regOffset: The register offset as it apears in the
+ *           GT spec
+ *                   (or any other PCI device spec)
+ *           pciDevNum: The device number needs to be addressed.
+ *
+ *  Configuration Address 0xCF8:
+ *
+ *       31 30    24 23  16 15  11 10     8 7      2  0     <=bit Number
+ *  |congif|Reserved|  Bus |Device|Function|Register|00|
+ *  |Enable|        |Number|Number| Number | Number |  |    <=field Name
+ *
+ */
+static void pci0WriteConfigReg(unsigned int offset,
+			       struct pci_dev *device, unsigned int data)
+{
+	unsigned int DataForRegCf8;
+
+	DataForRegCf8 = ((PCI_SLOT(device->devfn) << 11) |
+			 (PCI_FUNC(device->devfn) << 8) |
+			 (offset & ~0x3)) | 0x80000000;
+	GT_WRITE(GT_PCI0_CFGADDR_OFS, DataForRegCf8);
+
+	if (PCI_SLOT(device->devfn) == SELF) 	/* This board */
+		GT_WRITE(GT_PCI0_CFGDATA_OFS, data);
+	else 			/* configuration Transaction over the pci. */
+		__GT_WRITE(GT_PCI0_CFGDATA_OFS, data);
+}
+
+extern struct pci_ops gt64120_pci_ops;
+
+void __init pcibios_init(void)
+{
+	u32 tmp;
+	struct pci_dev controller;
+
+	controller.devfn = SELF;
+
+	tmp = GT_READ(GT_PCI0_CMD_OFS);		/* Huh??? -- Ralf  */
+	tmp = GT_READ(GT_PCI0_BARE_OFS);
+
+	/*
+	 * You have to enable bus mastering to configure any other
+	 * card on the bus.
+	 */
+	tmp = pci0ReadConfigReg(PCI_COMMAND, &controller);
+	tmp |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
+	pci0WriteConfigReg(PCI_COMMAND, &controller, tmp);
+
+	/*
+	 *  Reset PCI I/O and PCI MEM values to ones supported by EVM.
+	 */
+	ioport_resource.start	= GT_PCI_IO_BASE;
+	ioport_resource.end	= GT_PCI_IO_BASE + GT_PCI_IO_SIZE - 1;
+	iomem_resource.start	= GT_PCI_MEM_BASE;
+	iomem_resource.end	= GT_PCI_MEM_BASE + GT_PCI_MEM_SIZE - 1;
+
+	pci_scan_bus(0, &gt64120_pci_ops, NULL);
+}
diff --git a/arch/mips/gt64120/common/time.c b/arch/mips/gt64120/common/time.c
new file mode 100644
index 000000000000..2287b59536e5
--- /dev/null
+++ b/arch/mips/gt64120/common/time.c
@@ -0,0 +1,100 @@
+/*
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * Galileo Technology chip interrupt handler
+ */
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <asm/ptrace.h>
+#include <asm/gt64120.h>
+
+/*
+ * These are interrupt handlers for the GT on-chip interrupts.  They all come
+ * in to the MIPS on a single interrupt line, and have to be handled and ack'ed
+ * differently than other MIPS interrupts.
+ */
+
+static void gt64120_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	unsigned int irq_src, int_high_src, irq_src_mask, int_high_src_mask;
+	int handled = 0;
+
+	irq_src = GT_READ(GT_INTRCAUSE_OFS);
+	irq_src_mask = GT_READ(GT_INTRMASK_OFS);
+	int_high_src = GT_READ(GT_HINTRCAUSE_OFS);
+	int_high_src_mask = GT_READ(GT_HINTRMASK_OFS);
+	irq_src = irq_src & irq_src_mask;
+	int_high_src = int_high_src & int_high_src_mask;
+
+	if (irq_src & 0x00000800) {	/* Check for timer interrupt */
+		handled = 1;
+		irq_src &= ~0x00000800;
+		do_timer(regs);
+#ifndef CONFIG_SMP
+		update_process_times(user_mode(regs));
+#endif
+	}
+
+	GT_WRITE(GT_INTRCAUSE_OFS, 0);
+	GT_WRITE(GT_HINTRCAUSE_OFS, 0);
+}
+
+/*
+ * Initializes timer using galileo's built in timer.
+ */
+#ifdef CONFIG_SYSCLK_100
+#define Sys_clock (100 * 1000000)	// 100 MHz
+#endif
+#ifdef CONFIG_SYSCLK_83
+#define Sys_clock (83.333 * 1000000)	// 83.333 MHz
+#endif
+#ifdef CONFIG_SYSCLK_75
+#define Sys_clock (75 * 1000000)	// 75 MHz
+#endif
+
+/*
+ * This will ignore the standard MIPS timer interrupt handler that is passed in
+ * as *irq (=irq0 in ../kernel/time.c).  We will do our own timer interrupt
+ * handling.
+ */
+void gt64120_time_init(void)
+{
+	static struct irqaction timer;
+
+	/* Disable timer first */
+	GT_WRITE(GT_TC_CONTROL_OFS, 0);
+	/* Load timer value for 100 Hz */
+	GT_WRITE(GT_TC3_OFS, Sys_clock / 100);
+
+	/*
+	 * Create the IRQ structure entry for the timer.  Since we're too early
+	 * in the boot process to use the "request_irq()" call, we'll hard-code
+	 * the values to the correct interrupt line.
+	 */
+	timer.handler = gt64120_irq;
+	timer.flags = SA_SHIRQ | SA_INTERRUPT;
+	timer.name = "timer";
+	timer.dev_id = NULL;
+	timer.next = NULL;
+	timer.mask = CPU_MASK_NONE;
+	irq_desc[GT_TIMER].action = &timer;
+
+	enable_irq(GT_TIMER);
+
+	/* Enable timer ints */
+	GT_WRITE(GT_TC_CONTROL_OFS, 0xc0);
+	/* clear Cause register first */
+	GT_WRITE(GT_INTRCAUSE_OFS, 0x0);
+	/* Unmask timer int */
+	GT_WRITE(GT_INTRMASK_OFS, 0x800);
+	/* Clear High int register */
+	GT_WRITE(GT_HINTRCAUSE_OFS, 0x0);
+	/* Mask All interrupts at High cause interrupt */
+	GT_WRITE(GT_HINTRMASK_OFS, 0x0);
+}