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