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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * ASP Device Driver4 *5 * (c) Copyright 2000 The Puffin Group Inc.6 *7 * (c) 2000-2023 by Helge Deller <deller@gmx.de>8 */9 10#include <linux/errno.h>11#include <linux/init.h>12#include <linux/interrupt.h>13#include <linux/module.h>14#include <linux/types.h>15#include <asm/io.h>16#include <asm/led.h>17 18#include "gsc.h"19 20#define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */21 22#define ASP_VER_OFFSET 0x20 /* offset of ASP version */23 24#define ASP_LED_ADDR 0xf080002025 26#define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */27 28static struct gsc_asic asp;29 30static void asp_choose_irq(struct parisc_device *dev, void *ctrl)31{32 int irq;33 34 switch (dev->id.sversion) {35 case 0x71: irq = 9; break; /* SCSI */36 case 0x72: irq = 8; break; /* LAN */37 case 0x73: irq = 1; break; /* HIL */38 case 0x74: irq = 7; break; /* Centronics */39 case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */40 case 0x76: irq = 10; break; /* EISA BA */41 case 0x77: irq = 11; break; /* Graphics1 */42 case 0x7a: irq = 13; break; /* Audio (Bushmaster) */43 case 0x7b: irq = 13; break; /* Audio (Scorpio) */44 case 0x7c: irq = 3; break; /* FW SCSI */45 case 0x7d: irq = 4; break; /* FDDI */46 case 0x7f: irq = 13; break; /* Audio (Outfield) */47 default: return; /* Unknown */48 }49 50 gsc_asic_assign_irq(ctrl, irq, &dev->irq);51 52 switch (dev->id.sversion) {53 case 0x73: irq = 2; break; /* i8042 High-priority */54 case 0x76: irq = 0; break; /* EISA BA */55 default: return; /* Other */56 }57 58 gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);59}60 61/* There are two register ranges we're interested in. Interrupt /62 * Status / LED are at 0xf080xxxx and Asp special registers are at63 * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for64 * the purposes of interrupt handling, we have to tell other bits of65 * the kernel to look at the other registers.66 */67#define ASP_INTERRUPT_ADDR 0xf080000068 69static int __init asp_init_chip(struct parisc_device *dev)70{71 struct gsc_irq gsc_irq;72 int ret;73 74 asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;75 asp.name = (asp.version == 1) ? "Asp" : "Cutoff";76 asp.hpa = ASP_INTERRUPT_ADDR;77 78 printk(KERN_INFO "%s version %d at 0x%lx found.\n", 79 asp.name, asp.version, (unsigned long)dev->hpa.start);80 81 /* the IRQ ASP should use */82 ret = -EBUSY;83 dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);84 if (dev->irq < 0) {85 printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);86 goto out;87 }88 89 asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;90 91 ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);92 if (ret < 0)93 goto out;94 95 /* Program VIPER to interrupt on the ASP irq */96 gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);97 98 /* Done init'ing, register this driver */99 ret = gsc_common_setup(dev, &asp);100 if (ret)101 goto out;102 103 gsc_fixup_irqs(dev, &asp, asp_choose_irq);104 /* Mongoose is a sibling of Asp, not a child... */105 gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);106 107 /* initialize the chassis LEDs */ 108#ifdef CONFIG_CHASSIS_LCD_LED 109 register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 110 ASP_LED_ADDR);111#endif112 113 out:114 return ret;115}116 117static const struct parisc_device_id asp_tbl[] __initconst = {118 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },119 { 0, }120};121MODULE_DEVICE_TABLE(parisc, asp_tbl);122 123static struct parisc_driver asp_driver __refdata = {124 .name = "asp",125 .id_table = asp_tbl,126 .probe = asp_init_chip,127};128 129static int __init asp_init(void)130{131 return register_parisc_driver(&asp_driver);132}133arch_initcall(asp_init);134