patch-2.1.132 linux/arch/arm/kernel/hw-ebsa285.c

• Lines: 162
• Date: Thu Dec 17 09:05:42 1998
• Orig file: v2.1.131/linux/arch/arm/kernel/hw-ebsa285.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.131/linux/arch/arm/kernel/hw-ebsa285.c linux/arch/arm/kernel/hw-ebsa285.c
@@ -0,0 +1,161 @@
+/*
+ * arch/arm/kernel/hw-ebsa286.c
+ *
+ * EBSA285 hardware specific functions
+ *
+ * Copyright (C) 1998 Russell King, Phil Blundel
+ */
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/ptrace.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/system.h>
+
+extern int setup_arm_irq(int, struct irqaction *);
+
+extern void pci_set_cmd(struct pci_dev *dev, unsigned short clear, unsigned short set);
+extern void pci_set_base_addr(struct pci_dev *dev, int idx, unsigned int addr);
+extern void pci_set_irq_line(struct pci_dev *dev, unsigned int irq);
+
+static int irqmap_ebsa[] __initdata = { 9, 8, 18, 11 };
+static int irqmap_cats[] __initdata = { 18, 8, 9, 11 };
+
+__initfunc(static int ebsa_irqval(struct pci_dev *dev))
+{
+	unsigned char pin;
+	
+	pcibios_read_config_byte(dev->bus->number,
+				 dev->devfn,
+				 PCI_INTERRUPT_PIN,
+				 &pin);
+	
+	return irqmap_ebsa[(PCI_SLOT(dev->devfn) + pin) & 3];
+}
+
+__initfunc(static int cats_irqval(struct pci_dev *dev))
+{
+	if (dev->irq >= 128)
+		return 32 + (dev->irq & 0x1f);
+
+	switch (dev->irq) {
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		return irqmap_cats[dev->irq - 1];
+	case 0:
+		return 0;
+	}
+
+	printk("PCI: device %02x:%02x has unknown irq line %x\n",
+	       dev->bus->number, dev->devfn, dev->irq);
+	return 0;
+}
+
+__initfunc(void pcibios_fixup_ebsa285(struct pci_dev *dev))
+{
+	char cmd;
+
+	/* sort out the irq mapping for this device */
+	switch (machine_type) {
+	case MACH_TYPE_EBSA285:
+		dev->irq = ebsa_irqval(dev);
+		break;
+	case MACH_TYPE_CATS:
+		dev->irq = cats_irqval(dev);
+		break;
+	}
+
+	/* Turn on bus mastering - boot loader doesn't
+	 * - perhaps it should! - dag
+	 */
+	pci_read_config_byte(dev, PCI_COMMAND, &cmd);
+	pci_write_config_byte(dev, PCI_COMMAND, cmd | PCI_COMMAND_MASTER);
+}
+
+static void irq_pci_err(int irq, void *dev_id, struct pt_regs *regs)
+{
+	const char *err = "unknown";
+	unsigned long cmd = *(unsigned long *)0xfe000004 & 0xffff;
+	unsigned long ctrl = *(unsigned long *)0xfe00013c & 0xffffde07;
+	static unsigned long next_warn[7];
+	int idx = 6;
+
+	switch(irq) {
+	case IRQ_PCIPARITY:
+		*(unsigned long *)0xfe000004 = cmd | 1 << 31;
+		idx = 0;
+		err = "parity";
+		break;
+
+	case IRQ_PCITARGETABORT:
+		*(unsigned long *)0xfe000004 = cmd | 1 << 28;
+		idx = 1;
+		err = "target abort";
+		break;
+
+	case IRQ_PCIMASTERABORT:
+		*(unsigned long *)0xfe000004 = cmd | 1 << 29;
+		idx = 2;
+		err = "master abort";
+		break;
+
+	case IRQ_PCIDATAPARITY:
+		*(unsigned long *)0xfe000004 = cmd | 1 << 24;
+		idx = 3;
+		err = "data parity";
+		break;
+
+	case IRQ_DISCARDTIMER:
+		*(unsigned long *)0xfe00013c = ctrl | 1 << 8;
+		idx = 4;
+		err = "discard timer";
+		break;
+
+	case IRQ_SERR:
+		*(unsigned long *)0xfe00013c = ctrl | 1 << 3;
+		idx = 5;
+		err = "system";
+		break;
+	}
+	if (next_warn[idx] <= jiffies) {
+		next_warn[idx] = jiffies + 3 * HZ / 100;
+		printk(KERN_ERR "PCI %s error detected\n", err);
+	}
+}
+
+static struct irqaction irq_pci_error = {
+	irq_pci_err, SA_INTERRUPT, 0, "PCI error", NULL, NULL
+};
+
+__initfunc(void pcibios_init_ebsa285(void))
+{
+	setup_arm_irq(IRQ_PCIPARITY, &irq_pci_error);
+	setup_arm_irq(IRQ_PCITARGETABORT, &irq_pci_error);
+	setup_arm_irq(IRQ_PCIMASTERABORT, &irq_pci_error);
+	setup_arm_irq(IRQ_PCIDATAPARITY, &irq_pci_error);
+	setup_arm_irq(IRQ_DISCARDTIMER, &irq_pci_error);
+	setup_arm_irq(IRQ_SERR, &irq_pci_error);
+
+	/*
+	 * Map our SDRAM at a known address in PCI space, just in case
+	 * the firmware had other ideas.  Using a nonzero base is slightly
+	 * bizarre but apparently necessary to avoid problems with some
+	 * video cards.
+	 *
+	 * We should really only do this if the central function is enabled.
+	 */
+	*(unsigned long *)0xfe000010 = 0;
+	*(unsigned long *)0xfe000018 = 0xe0000000;
+	*(unsigned long *)0xfe0000f8 = 0;
+	*(unsigned long *)0xfe0000fc = 0;
+	*(unsigned long *)0xfe000100 = 0x01fc0000;
+	*(unsigned long *)0xfe000104 = 0;
+	*(unsigned long *)0xfe000108 = 0x80000000;
+	*(unsigned long *)0xfe000004 = 0x17;
+}