patch-2.4.20 linux-2.4.20/drivers/gsc/asp.c

• Lines: 132
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/drivers/gsc/asp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/gsc/asp.c linux-2.4.20/drivers/gsc/asp.c
@@ -0,0 +1,131 @@
+/*
+ *	ASP Device Driver
+ *
+ *	(c) Copyright 2000 The Puffin Group Inc.
+ *
+ *	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.
+ *
+ *	by Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <asm/gsc.h>
+#include <asm/led.h>
+
+#include "busdevice.h"
+
+#define ASP_GSC_IRQ	3		/* hardcoded interrupt for GSC */
+
+#define ASP_VER_OFFSET 	0x20		/* offset of ASP version */
+
+#define ASP_LED_ADDR	0xf0800020
+
+#define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */
+
+static int asp_choose_irq(struct parisc_device *dev)
+{
+	int irq = -1;
+
+	switch (dev->id.sversion) {
+	case 0x71:	irq = 22; break; /* SCSI */
+	case 0x72:	irq = 23; break; /* LAN */
+	case 0x73:	irq = 30; break; /* HIL */
+	case 0x74:	irq = 24; break; /* Centronics */
+	case 0x75:	irq = (dev->hw_path == 4) ? 26 : 25; break; /* RS232 */
+	case 0x76:	irq = 21; break; /* EISA BA */
+	case 0x77:	irq = 20; break; /* Graphics1 */
+	case 0x7a:	irq = 18; break; /* Audio (Bushmaster) */
+	case 0x7b:	irq = 18; break; /* Audio (Scorpio) */
+	case 0x7c:	irq = 28; break; /* FW SCSI */
+	case 0x7d:	irq = 27; break; /* FDDI */
+	case 0x7f:	irq = 18; break; /* Audio (Outfield) */
+	}
+	return irq;
+}
+
+/* There are two register ranges we're interested in.  Interrupt /
+ * Status / LED are at 0xf080xxxx and Asp special registers are at
+ * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
+ * the purposes of interrupt handling, we have to tell other bits of
+ * the kernel to look at the other registers.
+ */
+#define ASP_INTERRUPT_ADDR 0xf0800000
+
+int __init
+asp_init_chip(struct parisc_device *dev)
+{
+	struct busdevice *asp;
+	struct gsc_irq gsc_irq;
+	int irq, ret;
+
+	asp = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
+	if(!asp)
+		return -ENOMEM;
+
+	asp->version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf;
+	asp->name = (asp->version == 1) ? "Asp" : "Cutoff";
+	asp->hpa = ASP_INTERRUPT_ADDR;
+
+	printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
+		asp->name, asp->version, dev->hpa);
+
+	/* the IRQ ASP should use */
+	ret = -EBUSY;
+	irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
+	if (irq < 0) {
+		printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__);
+		goto out;
+	}
+
+	ret = request_irq(gsc_irq.irq, busdev_barked, 0, "asp", asp);
+	if (ret < 0)
+		goto out;
+
+	/* Save this for debugging later */
+	asp->parent_irq = gsc_irq.irq;
+	asp->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
+
+	/* Program VIPER to interrupt on the ASP irq */
+	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
+
+	/* Done init'ing, register this driver */
+	ret = gsc_common_irqsetup(dev, asp);
+	if (ret)
+		goto out;
+
+	fixup_child_irqs(dev, asp->busdev_region->data.irqbase, asp_choose_irq);
+	/* Mongoose is a sibling of Asp, not a child... */
+	fixup_child_irqs(dev->parent, asp->busdev_region->data.irqbase,
+			asp_choose_irq);
+
+	/* initialize the chassis LEDs */ 
+#ifdef CONFIG_CHASSIS_LCD_LED	
+	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
+		    (char *)ASP_LED_ADDR);
+#endif
+
+	return 0;
+
+out:
+	kfree(asp);
+	return ret;
+}
+
+static struct parisc_device_id asp_tbl[] = {
+	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
+	{ 0, }
+};
+
+struct parisc_driver asp_driver = {
+	name:		"Asp",
+	id_table:	asp_tbl,
+	probe:		asp_init_chip,
+};