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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | /* * 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/irq.h> #include "gsc.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, }; |