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!

1 files changed, 328 insertions, 0 deletions

diff --git a/arch/ppc/syslib/gt64260_pic.c b/arch/ppc/syslib/gt64260_pic.c
new file mode 100644
index 000000000000..44aa87385451
--- /dev/null
+++ b/arch/ppc/syslib/gt64260_pic.c
@@ -0,0 +1,328 @@
+/*
+ * arch/ppc/syslib/gt64260_pic.c
+ *
+ * Interrupt controller support for Galileo's GT64260.
+ *
+ * Author: Chris Zankel <source@mvista.com>
+ * Modified by: Mark A. Greer <mgreer@mvista.com>
+ *
+ * Based on sources from Rabeeh Khoury / Galileo Technology
+ *
+ * 2001 (c) MontaVista, Software, Inc.  This file is licensed under
+ * the terms of the GNU General Public License version 2.  This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+/*
+ * This file contains the specific functions to support the GT64260
+ * interrupt controller.
+ *
+ * The GT64260 has two main interrupt registers (high and low) that
+ * summarizes the interrupts generated by the units of the GT64260.
+ * Each bit is assigned to an interrupt number, where the low register
+ * are assigned from IRQ0 to IRQ31 and the high cause register
+ * from IRQ32 to IRQ63
+ * The GPP (General Purpose Port) interrupts are assigned from IRQ64 (GPP0)
+ * to IRQ95 (GPP31).
+ * get_irq() returns the lowest interrupt number that is currently asserted.
+ *
+ * Note:
+ *  - This driver does not initialize the GPP when used as an interrupt
+ *    input.
+ */
+
+#include <linux/stddef.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/stddef.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/mv64x60.h>
+
+#define CPU_INTR_STR	"gt64260 cpu interface error"
+#define PCI0_INTR_STR	"gt64260 pci 0 error"
+#define PCI1_INTR_STR	"gt64260 pci 1 error"
+
+/* ========================== forward declaration ========================== */
+
+static void gt64260_unmask_irq(unsigned int);
+static void gt64260_mask_irq(unsigned int);
+
+/* ========================== local declarations =========================== */
+
+struct hw_interrupt_type gt64260_pic = {
+	.typename = " gt64260_pic ",
+	.enable   = gt64260_unmask_irq,
+	.disable  = gt64260_mask_irq,
+	.ack      = gt64260_mask_irq,
+	.end      = gt64260_unmask_irq,
+};
+
+u32 gt64260_irq_base = 0;	/* GT64260 handles the next 96 IRQs from here */
+
+static struct mv64x60_handle bh;
+
+/* gt64260_init_irq()
+ *
+ *  This function initializes the interrupt controller. It assigns
+ *  all interrupts from IRQ0 to IRQ95 to the gt64260 interrupt controller.
+ *
+ * Note:
+ *  We register all GPP inputs as interrupt source, but disable them.
+ */
+void __init
+gt64260_init_irq(void)
+{
+	int i;
+
+	if (ppc_md.progress)
+		ppc_md.progress("gt64260_init_irq: enter", 0x0);
+
+	bh.v_base = mv64x60_get_bridge_vbase();
+
+	ppc_cached_irq_mask[0] = 0;
+	ppc_cached_irq_mask[1] = 0x0f000000;	/* Enable GPP intrs */
+	ppc_cached_irq_mask[2] = 0;
+
+	/* disable all interrupts and clear current interrupts */
+	mv64x60_write(&bh, MV64x60_GPP_INTR_MASK, ppc_cached_irq_mask[2]);
+	mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, 0);
+	mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_LO, ppc_cached_irq_mask[0]);
+	mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_HI, ppc_cached_irq_mask[1]);
+
+	/* use the gt64260 for all (possible) interrupt sources */
+	for (i = gt64260_irq_base; i < (gt64260_irq_base + 96); i++)
+		irq_desc[i].handler = &gt64260_pic;
+
+	if (ppc_md.progress)
+		ppc_md.progress("gt64260_init_irq: exit", 0x0);
+}
+
+/*
+ * gt64260_get_irq()
+ *
+ *  This function returns the lowest interrupt number of all interrupts that
+ *  are currently asserted.
+ *
+ * Input Variable(s):
+ *  struct pt_regs*	not used
+ *
+ * Output Variable(s):
+ *  None.
+ *
+ * Returns:
+ *  int	<interrupt number> or -2 (bogus interrupt)
+ */
+int
+gt64260_get_irq(struct pt_regs *regs)
+{
+	int irq;
+	int irq_gpp;
+
+	irq = mv64x60_read(&bh, GT64260_IC_MAIN_CAUSE_LO);
+	irq = __ilog2((irq & 0x3dfffffe) & ppc_cached_irq_mask[0]);
+
+	if (irq == -1) {
+		irq = mv64x60_read(&bh, GT64260_IC_MAIN_CAUSE_HI);
+		irq = __ilog2((irq & 0x0f000db7) & ppc_cached_irq_mask[1]);
+
+		if (irq == -1)
+			irq = -2; /* bogus interrupt, should never happen */
+		else {
+			if (irq >= 24) {
+				irq_gpp = mv64x60_read(&bh,
+					MV64x60_GPP_INTR_CAUSE);
+				irq_gpp = __ilog2(irq_gpp &
+					ppc_cached_irq_mask[2]);
+
+				if (irq_gpp == -1)
+					irq = -2;
+				else {
+					irq = irq_gpp + 64;
+					mv64x60_write(&bh,
+						MV64x60_GPP_INTR_CAUSE,
+						~(1 << (irq - 64)));
+				}
+			} else
+				irq += 32;
+		}
+	}
+
+	(void)mv64x60_read(&bh, MV64x60_GPP_INTR_CAUSE);
+
+	if (irq < 0)
+		return (irq);
+	else
+		return (gt64260_irq_base + irq);
+}
+
+/* gt64260_unmask_irq()
+ *
+ *  This function enables an interrupt.
+ *
+ * Input Variable(s):
+ *  unsigned int	interrupt number (IRQ0...IRQ95).
+ *
+ * Output Variable(s):
+ *  None.
+ *
+ * Returns:
+ *  void
+ */
+static void
+gt64260_unmask_irq(unsigned int irq)
+{
+	irq -= gt64260_irq_base;
+
+	if (irq > 31)
+		if (irq > 63) /* unmask GPP irq */
+			mv64x60_write(&bh, MV64x60_GPP_INTR_MASK,
+				ppc_cached_irq_mask[2] |= (1 << (irq - 64)));
+		else /* mask high interrupt register */
+			mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_HI,
+				ppc_cached_irq_mask[1] |= (1 << (irq - 32)));
+	else /* mask low interrupt register */
+		mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_LO,
+			ppc_cached_irq_mask[0] |= (1 << irq));
+
+	(void)mv64x60_read(&bh, MV64x60_GPP_INTR_MASK);
+	return;
+}
+
+/* gt64260_mask_irq()
+ *
+ *  This function disables the requested interrupt.
+ *
+ * Input Variable(s):
+ *  unsigned int	interrupt number (IRQ0...IRQ95).
+ *
+ * Output Variable(s):
+ *  None.
+ *
+ * Returns:
+ *  void
+ */
+static void
+gt64260_mask_irq(unsigned int irq)
+{
+	irq -= gt64260_irq_base;
+
+	if (irq > 31)
+		if (irq > 63) /* mask GPP irq */
+			mv64x60_write(&bh, MV64x60_GPP_INTR_MASK,
+				ppc_cached_irq_mask[2] &= ~(1 << (irq - 64)));
+		else /* mask high interrupt register */
+			mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_HI,
+				ppc_cached_irq_mask[1] &= ~(1 << (irq - 32)));
+	else /* mask low interrupt register */
+		mv64x60_write(&bh, GT64260_IC_CPU_INTR_MASK_LO,
+			ppc_cached_irq_mask[0] &= ~(1 << irq));
+
+	(void)mv64x60_read(&bh, MV64x60_GPP_INTR_MASK);
+	return;
+}
+
+static irqreturn_t
+gt64260_cpu_error_int_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	printk(KERN_ERR "gt64260_cpu_error_int_handler: %s 0x%08x\n",
+		"Error on CPU interface - Cause regiser",
+		mv64x60_read(&bh, MV64x60_CPU_ERR_CAUSE));
+	printk(KERN_ERR "\tCPU error register dump:\n");
+	printk(KERN_ERR "\tAddress low  0x%08x\n",
+	       mv64x60_read(&bh, MV64x60_CPU_ERR_ADDR_LO));
+	printk(KERN_ERR "\tAddress high 0x%08x\n",
+	       mv64x60_read(&bh, MV64x60_CPU_ERR_ADDR_HI));
+	printk(KERN_ERR "\tData low     0x%08x\n",
+	       mv64x60_read(&bh, MV64x60_CPU_ERR_DATA_LO));
+	printk(KERN_ERR "\tData high    0x%08x\n",
+	       mv64x60_read(&bh, MV64x60_CPU_ERR_DATA_HI));
+	printk(KERN_ERR "\tParity       0x%08x\n",
+	       mv64x60_read(&bh, MV64x60_CPU_ERR_PARITY));
+	mv64x60_write(&bh, MV64x60_CPU_ERR_CAUSE, 0);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t
+gt64260_pci_error_int_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	u32 val;
+	unsigned int pci_bus = (unsigned int)dev_id;
+
+	if (pci_bus == 0) {	/* Error on PCI 0 */
+		val = mv64x60_read(&bh, MV64x60_PCI0_ERR_CAUSE);
+		printk(KERN_ERR "%s: Error in PCI %d Interface\n",
+			"gt64260_pci_error_int_handler", pci_bus);
+		printk(KERN_ERR "\tPCI %d error register dump:\n", pci_bus);
+		printk(KERN_ERR "\tCause register 0x%08x\n", val);
+		printk(KERN_ERR "\tAddress Low    0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI0_ERR_ADDR_LO));
+		printk(KERN_ERR "\tAddress High   0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI0_ERR_ADDR_HI));
+		printk(KERN_ERR "\tAttribute      0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI0_ERR_DATA_LO));
+		printk(KERN_ERR "\tCommand        0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI0_ERR_CMD));
+		mv64x60_write(&bh, MV64x60_PCI0_ERR_CAUSE, ~val);
+	}
+	if (pci_bus == 1) {	/* Error on PCI 1 */
+		val = mv64x60_read(&bh, MV64x60_PCI1_ERR_CAUSE);
+		printk(KERN_ERR "%s: Error in PCI %d Interface\n",
+			"gt64260_pci_error_int_handler", pci_bus);
+		printk(KERN_ERR "\tPCI %d error register dump:\n", pci_bus);
+		printk(KERN_ERR "\tCause register 0x%08x\n", val);
+		printk(KERN_ERR "\tAddress Low    0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI1_ERR_ADDR_LO));
+		printk(KERN_ERR "\tAddress High   0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI1_ERR_ADDR_HI));
+		printk(KERN_ERR "\tAttribute      0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI1_ERR_DATA_LO));
+		printk(KERN_ERR "\tCommand        0x%08x\n",
+		       mv64x60_read(&bh, MV64x60_PCI1_ERR_CMD));
+		mv64x60_write(&bh, MV64x60_PCI1_ERR_CAUSE, ~val);
+	}
+	return IRQ_HANDLED;
+}
+
+static int __init
+gt64260_register_hdlrs(void)
+{
+	int rc;
+
+	/* Register CPU interface error interrupt handler */
+	if ((rc = request_irq(MV64x60_IRQ_CPU_ERR,
+		gt64260_cpu_error_int_handler, SA_INTERRUPT, CPU_INTR_STR, 0)))
+		printk(KERN_WARNING "Can't register cpu error handler: %d", rc);
+
+	mv64x60_write(&bh, MV64x60_CPU_ERR_MASK, 0);
+	mv64x60_write(&bh, MV64x60_CPU_ERR_MASK, 0x000000fe);
+
+	/* Register PCI 0 error interrupt handler */
+	if ((rc = request_irq(MV64360_IRQ_PCI0, gt64260_pci_error_int_handler,
+		    SA_INTERRUPT, PCI0_INTR_STR, (void *)0)))
+		printk(KERN_WARNING "Can't register pci 0 error handler: %d",
+			rc);
+
+	mv64x60_write(&bh, MV64x60_PCI0_ERR_MASK, 0);
+	mv64x60_write(&bh, MV64x60_PCI0_ERR_MASK, 0x003c0c24);
+
+	/* Register PCI 1 error interrupt handler */
+	if ((rc = request_irq(MV64360_IRQ_PCI1, gt64260_pci_error_int_handler,
+		    SA_INTERRUPT, PCI1_INTR_STR, (void *)1)))
+		printk(KERN_WARNING "Can't register pci 1 error handler: %d",
+			rc);
+
+	mv64x60_write(&bh, MV64x60_PCI1_ERR_MASK, 0);
+	mv64x60_write(&bh, MV64x60_PCI1_ERR_MASK, 0x003c0c24);
+
+	return 0;
+}
+
+arch_initcall(gt64260_register_hdlrs);