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135 lines
3.0 KiB
135 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* WAX Device Driver |
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* |
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* (c) Copyright 2000 The Puffin Group Inc. |
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* |
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* by Helge Deller <[email protected]> |
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*/ |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <asm/io.h> |
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#include <asm/hardware.h> |
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#include "gsc.h" |
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#define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */ |
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static void wax_choose_irq(struct parisc_device *dev, void *ctrl) |
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{ |
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int irq; |
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switch (dev->id.sversion) { |
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case 0x73: irq = 1; break; /* i8042 General */ |
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case 0x8c: irq = 6; break; /* Serial */ |
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case 0x90: irq = 10; break; /* EISA */ |
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default: return; /* Unknown */ |
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} |
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gsc_asic_assign_irq(ctrl, irq, &dev->irq); |
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switch (dev->id.sversion) { |
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case 0x73: irq = 2; break; /* i8042 High-priority */ |
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case 0x90: irq = 0; break; /* EISA NMI */ |
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default: return; /* No secondary IRQ */ |
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} |
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gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); |
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} |
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static void __init |
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wax_init_irq(struct gsc_asic *wax) |
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{ |
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unsigned long base = wax->hpa; |
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/* Wax-off */ |
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gsc_writel(0x00000000, base+OFFSET_IMR); |
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/* clear pending interrupts */ |
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gsc_readl(base+OFFSET_IRR); |
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/* We're not really convinced we want to reset the onboard |
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* devices. Firmware does it for us... |
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*/ |
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/* Resets */ |
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// gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */ |
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// gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */ |
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} |
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static int __init wax_init_chip(struct parisc_device *dev) |
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{ |
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struct gsc_asic *wax; |
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struct parisc_device *parent; |
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struct gsc_irq gsc_irq; |
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int ret; |
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wax = kzalloc(sizeof(*wax), GFP_KERNEL); |
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if (!wax) |
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return -ENOMEM; |
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wax->name = "wax"; |
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wax->hpa = dev->hpa.start; |
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wax->version = 0; /* gsc_readb(wax->hpa+WAX_VER); */ |
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printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa); |
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/* Stop wax hissing for a bit */ |
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wax_init_irq(wax); |
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/* the IRQ wax should use */ |
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dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ); |
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if (dev->irq < 0) { |
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printk(KERN_ERR "%s(): cannot get GSC irq\n", |
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__func__); |
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kfree(wax); |
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return -EBUSY; |
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} |
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wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; |
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ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax); |
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if (ret < 0) { |
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kfree(wax); |
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return ret; |
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} |
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/* enable IRQ's for devices below WAX */ |
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gsc_writel(wax->eim, wax->hpa + OFFSET_IAR); |
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/* Done init'ing, register this driver */ |
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ret = gsc_common_setup(dev, wax); |
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if (ret) { |
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kfree(wax); |
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return ret; |
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} |
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gsc_fixup_irqs(dev, wax, wax_choose_irq); |
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/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */ |
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parent = parisc_parent(dev); |
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if (parent->id.hw_type != HPHW_IOA) { |
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gsc_fixup_irqs(parent, wax, wax_choose_irq); |
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} |
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return ret; |
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} |
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static const struct parisc_device_id wax_tbl[] __initconst = { |
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{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e }, |
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{ 0, } |
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}; |
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MODULE_DEVICE_TABLE(parisc, wax_tbl); |
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struct parisc_driver wax_driver __refdata = { |
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.name = "wax", |
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.id_table = wax_tbl, |
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.probe = wax_init_chip, |
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};
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