1 /* 2 * ASP Device Driver 3 * 4 * (c) Copyright 2000 The Puffin Group Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * by Helge Deller <deller@gmx.de> 12 */ 13 14 #include <linux/errno.h> 15 #include <linux/init.h> 16 #include <linux/interrupt.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <linux/types.h> 20 #include <asm/io.h> 21 #include <asm/led.h> 22 23 #include "gsc.h" 24 25 #define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */ 26 27 #define ASP_VER_OFFSET 0x20 /* offset of ASP version */ 28 29 #define ASP_LED_ADDR 0xf0800020 30 31 #define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */ 32 33 static struct gsc_asic asp; 34 35 static void asp_choose_irq(struct parisc_device *dev, void *ctrl) 36 { 37 int irq; 38 39 switch (dev->id.sversion) { 40 case 0x71: irq = 9; break; /* SCSI */ 41 case 0x72: irq = 8; break; /* LAN */ 42 case 0x73: irq = 1; break; /* HIL */ 43 case 0x74: irq = 7; break; /* Centronics */ 44 case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */ 45 case 0x76: irq = 10; break; /* EISA BA */ 46 case 0x77: irq = 11; break; /* Graphics1 */ 47 case 0x7a: irq = 13; break; /* Audio (Bushmaster) */ 48 case 0x7b: irq = 13; break; /* Audio (Scorpio) */ 49 case 0x7c: irq = 3; break; /* FW SCSI */ 50 case 0x7d: irq = 4; break; /* FDDI */ 51 case 0x7f: irq = 13; break; /* Audio (Outfield) */ 52 default: return; /* Unknown */ 53 } 54 55 gsc_asic_assign_irq(ctrl, irq, &dev->irq); 56 57 switch (dev->id.sversion) { 58 case 0x73: irq = 2; break; /* i8042 High-priority */ 59 case 0x76: irq = 0; break; /* EISA BA */ 60 default: return; /* Other */ 61 } 62 63 gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); 64 } 65 66 /* There are two register ranges we're interested in. Interrupt / 67 * Status / LED are at 0xf080xxxx and Asp special registers are at 68 * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for 69 * the purposes of interrupt handling, we have to tell other bits of 70 * the kernel to look at the other registers. 71 */ 72 #define ASP_INTERRUPT_ADDR 0xf0800000 73 74 int __init 75 asp_init_chip(struct parisc_device *dev) 76 { 77 struct gsc_irq gsc_irq; 78 int ret; 79 80 asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf; 81 asp.name = (asp.version == 1) ? "Asp" : "Cutoff"; 82 asp.hpa = ASP_INTERRUPT_ADDR; 83 84 printk(KERN_INFO "%s version %d at 0x%lx found.\n", 85 asp.name, asp.version, dev->hpa.start); 86 87 /* the IRQ ASP should use */ 88 ret = -EBUSY; 89 dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ); 90 if (dev->irq < 0) { 91 printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__); 92 goto out; 93 } 94 95 asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; 96 97 ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp); 98 if (ret < 0) 99 goto out; 100 101 /* Program VIPER to interrupt on the ASP irq */ 102 gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD); 103 104 /* Done init'ing, register this driver */ 105 ret = gsc_common_setup(dev, &asp); 106 if (ret) 107 goto out; 108 109 gsc_fixup_irqs(dev, &asp, asp_choose_irq); 110 /* Mongoose is a sibling of Asp, not a child... */ 111 gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq); 112 113 /* initialize the chassis LEDs */ 114 #ifdef CONFIG_CHASSIS_LCD_LED 115 register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 116 ASP_LED_ADDR); 117 #endif 118 119 out: 120 return ret; 121 } 122 123 static struct parisc_device_id asp_tbl[] = { 124 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, 125 { 0, } 126 }; 127 128 struct parisc_driver asp_driver = { 129 .name = "asp", 130 .id_table = asp_tbl, 131 .probe = asp_init_chip, 132 }; 133