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

• Lines: 246
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/drivers/gsc/lasi.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/gsc/lasi.c linux-2.4.20/drivers/gsc/lasi.c
@@ -0,0 +1,245 @@
+/*
+ *	LASI Device Driver
+ *
+ *	(c) Copyright 1999 Red Hat Software
+ *	Portions (c) Copyright 1999 The Puffin Group Inc.
+ *	Portions (c) Copyright 1999 Hewlett-Packard
+ *
+ *	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 Alan Cox <alan@redhat.com> and 
+ * 	   Alex deVries <adevries@thepuffingroup.com> 
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <asm/gsc.h>
+#include <asm/hardware.h>
+#include <asm/led.h>
+
+#include "busdevice.h"
+
+
+#define LASI_VER	0xC008	/* LASI Version */
+
+#define LASI_IO_CONF	0x7FFFE	/* LASI primary configuration register */
+#define LASI_IO_CONF2	0x7FFFF	/* LASI secondary configuration register */
+
+static int lasi_choose_irq(struct parisc_device *dev)
+{
+	int irq;
+
+	/*
+	** "irq" bits below are numbered relative to most significant bit.
+	*/
+	switch (dev->id.sversion) {
+		case 0x74:	irq = 24; break; /* Centronics */
+		case 0x7B:	irq = 18; break; /* Audio */
+		case 0x81:	irq = 17; break; /* Lasi itself */
+		case 0x82:	irq = 22; break; /* SCSI */
+		case 0x83:	irq = 11; break; /* Floppy */
+		case 0x84:	irq =  5; break; /* PS/2 Keyboard */
+		case 0x87:	irq = 13; break; /* ISDN */
+		case 0x8A:	irq = 23; break; /* LAN */
+		case 0x8C:	irq = 26; break; /* RS232 */
+		case 0x8D:	irq = (dev->hw_path == 13) ? 15 : 14;
+						break; /* Telephone */
+		default: 	irq = -1; break; /* unknown */
+	}
+
+	return irq;
+}
+
+static void __init
+lasi_init_irq(struct busdevice *this_lasi)
+{
+	unsigned long lasi_base = this_lasi->hpa;
+
+	/* Stop LASI barking for a bit */
+	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);
+
+	/* clear pending interrupts */
+	gsc_readl(lasi_base+OFFSET_IRR);
+
+	/* We're not really convinced we want to reset the onboard
+         * devices. Firmware does it for us...
+	 */
+
+	/* Resets */
+	/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/	/* Parallel */
+	gsc_writel(0xFFFFFFFF, lasi_base+0x4004);	/* Audio */
+	/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/	/* Serial */ 
+	/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/	/* SCSI */
+	gsc_writel(0xFFFFFFFF, lasi_base+0x7000);	/* LAN */
+	gsc_writel(0xFFFFFFFF, lasi_base+0x8000);	/* Keyboard */
+	gsc_writel(0xFFFFFFFF, lasi_base+0xA000);	/* FDC */
+	
+	/* Ok we hit it on the head with a hammer, our Dog is now
+	** comatose and muzzled.  Devices will now unmask LASI
+	** interrupts as they are registered as irq's in the LASI range.
+	*/
+	/* XXX: I thought it was `awks that got `it on the `ead with an
+	 * `ammer.  -- willy
+	 */
+}
+
+
+/*
+   ** lasi_led_init()
+   ** 
+   ** lasi_led_init() initializes the LED controller on the LASI.
+   **
+   ** Since Mirage and Electra machines use a different LED
+   ** address register, we need to check for these machines 
+   ** explicitly.
+ */
+
+#ifndef CONFIG_CHASSIS_LCD_LED
+
+#define lasi_led_init(x)	/* nothing */
+
+#else
+
+void __init lasi_led_init(unsigned long lasi_hpa)
+{
+	unsigned long datareg;
+
+	switch (CPU_HVERSION) {
+	/* Gecko machines have only one single LED, which can be permanently 
+	   turned on by writing a zero into the power control register. */ 
+	case 0x600:		/* Gecko (712/60) */
+	case 0x601:		/* Gecko (712/80) */
+	case 0x602:		/* Gecko (712/100) */
+	case 0x603:		/* Anole 64 (743/64) */
+	case 0x604:		/* Anole 100 (743/100) */
+	case 0x605:		/* Gecko (712/120) */
+		datareg = lasi_hpa + 0x0000C000;
+		gsc_writeb(0, datareg);
+		return; /* no need to register the LED interrupt-function */  
+
+	/* Mirage and Electra machines need special offsets */
+	case 0x60A:		/* Mirage Jr (715/64) */
+	case 0x60B:		/* Mirage 100 */
+	case 0x60C:		/* Mirage 100+ */
+	case 0x60D:		/* Electra 100 */
+	case 0x60E:		/* Electra 120 */
+		datareg = lasi_hpa - 0x00020000;
+		break;
+
+	default:
+		datareg = lasi_hpa + 0x0000C000;
+		break;
+	} /* switch() */
+
+	register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, (char *)datareg);
+}
+#endif
+
+/*
+ * lasi_power_off
+ *
+ * Function for lasi to turn off the power.  This is accomplished by setting a
+ * 1 to PWR_ON_L in the Power Control Register
+ * 
+ */
+
+static unsigned long lasi_power_off_hpa;
+
+static void lasi_power_off(void)
+{
+	unsigned long datareg;
+
+	/* calculate addr of the Power Control Register */
+	datareg = lasi_power_off_hpa + 0x0000C000;
+
+	/* Power down the machine */
+	gsc_writel(0x02, datareg);
+}
+
+int __init
+lasi_init_chip(struct parisc_device *dev)
+{
+	struct busdevice *lasi;
+	struct gsc_irq gsc_irq;
+	int irq, ret;
+
+	lasi = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
+	if (!lasi)
+		return -ENOMEM;
+
+	lasi->name = "Lasi";
+	lasi->hpa = dev->hpa;
+
+	/* Check the 4-bit (yes, only 4) version register */
+	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
+	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
+		lasi->name, lasi->version, lasi->hpa);
+
+	/* initialize the chassis LEDs really early */ 
+	lasi_led_init(lasi->hpa);
+
+	/* Stop LASI barking for a bit */
+	lasi_init_irq(lasi);
+
+	/* the IRQ lasi should use */
+	irq = gsc_alloc_irq(&gsc_irq);
+	if (irq < 0) {
+		printk(KERN_ERR "%s(): cannot get GSC irq\n",
+				__FUNCTION__);
+		kfree(lasi);
+		return -EBUSY;
+	}
+
+	ret = request_irq(gsc_irq.irq, busdev_barked, 0, "lasi", lasi);
+	if (ret < 0) {
+		kfree(lasi);
+		return ret;
+	}
+
+	/* Save this for debugging later */
+	lasi->parent_irq = gsc_irq.irq;
+	lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
+
+	/* enable IRQ's for devices below LASI */
+	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);
+
+	/* Done init'ing, register this driver */
+	ret = gsc_common_irqsetup(dev, lasi);
+	if (ret) {
+		kfree(lasi);
+		return ret;
+	}    
+
+	fixup_child_irqs(dev, lasi->busdev_region->data.irqbase,
+			lasi_choose_irq);
+
+	/* initialize the power off function */
+	/* FIXME: Record the LASI HPA for the power off function.  This should
+	 * ensure that only the first LASI (the one controlling the power off)
+	 * should set the HPA here */
+	lasi_power_off_hpa = lasi->hpa;
+	pm_power_off = lasi_power_off;
+	
+	return ret;
+}
+
+static struct parisc_device_id lasi_tbl[] = {
+	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
+	{ 0, }
+};
+
+struct parisc_driver lasi_driver = {
+	name:		"Lasi",
+	id_table:	lasi_tbl,
+	probe:		lasi_init_chip,
+};