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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [gsc/] [wax.c] - Rev 1774
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/* * 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 irq\n", __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, };
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