// SPDX-License-Identifier: GPL-2.0-or-later /* * WAX Device Driver * * (c) Copyright 2000 The Puffin Group Inc. * * 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/types.h> #include <asm/io.h> #include <asm/hardware.h> #include "gsc.h" #define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */ static void wax_choose_irq(struct parisc_device *dev, void *ctrl) { int irq; switch (dev->id.sversion) { case 0x73: irq = 1; break; /* i8042 General */ case 0x8c: irq = 6; break; /* Serial */ case 0x90: irq = 10; break; /* EISA */ default: return; /* Unknown */ } gsc_asic_assign_irq(ctrl, irq, &dev->irq); switch (dev->id.sversion) { case 0x73: irq = 2; break; /* i8042 High-priority */ case 0x90: irq = 0; break; /* EISA NMI */ default: return; /* No secondary IRQ */ } gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); } static void __init wax_init_irq(struct gsc_asic *wax) { unsigned long base = wax->hpa; /* Wax-off */ gsc_writel(0x00000000, base+OFFSET_IMR); /* clear pending interrupts */ 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 */ } static int __init wax_init_chip(struct parisc_device *dev) { struct gsc_asic *wax; struct parisc_device *parent; struct gsc_irq gsc_irq; int ret; wax = kzalloc(sizeof(*wax), GFP_KERNEL); if (!wax) return -ENOMEM; wax->name = "wax"; wax->hpa = dev->hpa.start; 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 */ dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ); if (dev->irq < 0) { printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); kfree(wax); return -EBUSY; } wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax); if (ret < 0) { kfree(wax); return ret; } /* enable IRQ's for devices below WAX */ gsc_writel(wax->eim, wax->hpa + OFFSET_IAR); /* Done init'ing, register this driver */ ret = gsc_common_setup(dev, wax); if (ret) { kfree(wax); return ret; } gsc_fixup_irqs(dev, wax, wax_choose_irq); /* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */ parent = parisc_parent(dev); if (parent->id.hw_type != HPHW_IOA) { gsc_fixup_irqs(parent, wax, wax_choose_irq); } return ret; } static const struct parisc_device_id wax_tbl[] __initconst = { { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e }, { 0, } }; MODULE_DEVICE_TABLE(parisc, wax_tbl); struct parisc_driver wax_driver __refdata = { .name = "wax", .id_table = wax_tbl, .probe = wax_init_chip, };