wax.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- /*
- * WAX 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/interrupt.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/module.h>
- #include <linux/slab.h>
- #include <linux/types.h>
- #include <asm/io.h>
- #include <asm/hardware.h>
- #include <asm/gsc.h>
- #include <asm/irq.h>
- #include "busdevice.h"
- #define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */
- #define WAX_GSC_NMI_IRQ 29
- static int wax_choose_irq(struct parisc_device *dev)
- {
- int irq = -1;
- switch (dev->id.sversion) {
- case 0x73: irq = 30; break; /* HIL */
- case 0x8c: irq = 25; break; /* RS232 */
- case 0x90: irq = 21; break; /* WAX EISA BA */
- }
- return irq;
- }
- static void __init
- wax_init_irq(struct busdevice *wax)
- {
- unsigned long base = wax->hpa;
- /* Stop WAX barking for a bit */
- gsc_writel(0x00000000, base+OFFSET_IMR);
- /* clear pending interrupts */
- (volatile u32) gsc_readl(base+OFFSET_IRR);
- /* We're not really convinced we want to reset the onboard
- * devices. Firmware does it for us...
- */
- /* Resets */
- // gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */
- // gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */
-
- /* Ok we hit it on the head with a hammer, our Dog is now
- ** comatose and muzzled. Devices will now unmask WAX
- ** interrupts as they are registered as irq's in the WAX range.
- */
- }
- int __init
- wax_init_chip(struct parisc_device *dev)
- {
- struct busdevice *wax;
- struct gsc_irq gsc_irq;
- int irq, ret;
- wax = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
- if (!wax)
- return -ENOMEM;
- wax->name = "Wax";
- wax->hpa = dev->hpa;
- wax->version = 0; /* gsc_readb(wax->hpa+WAX_VER); */
- printk(KERN_INFO "%s at 0x%lx found.n", wax->name, wax->hpa);
- /* Stop wax hissing for a bit */
- wax_init_irq(wax);
- /* the IRQ wax should use */
- irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
- if (irq < 0) {
- printk(KERN_ERR "%s(): cannot get GSC irqn",
- __FUNCTION__);
- kfree(wax);
- return -EBUSY;
- }
- ret = request_irq(gsc_irq.irq, busdev_barked, 0, "wax", wax);
- if (ret < 0) {
- kfree(wax);
- return ret;
- }
- /* Save this for debugging later */
- wax->parent_irq = gsc_irq.irq;
- wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
- /* enable IRQ's for devices below WAX */
- gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);
- /* Done init'ing, register this driver */
- ret = gsc_common_irqsetup(dev, wax);
- if (ret) {
- kfree(wax);
- return ret;
- }
- fixup_child_irqs(dev, wax->busdev_region->data.irqbase,
- wax_choose_irq);
- /* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
- if (dev->parent->id.hw_type != HPHW_IOA) {
- fixup_child_irqs(dev->parent, wax->busdev_region->data.irqbase,
- wax_choose_irq);
- }
- return ret;
- }
- static struct parisc_device_id wax_tbl[] = {
- { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
- { 0, }
- };
- MODULE_DEVICE_TABLE(parisc, wax_tbl);
- struct parisc_driver wax_driver = {
- name: "Wax",
- id_table: wax_tbl,
- probe: wax_init_chip,
- };