1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ASP Device Driver 4 * 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 0xf0800020 25 26 #define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */ 27 28 static struct gsc_asic asp; 29 30 static 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 at 63 * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for 64 * the purposes of interrupt handling, we have to tell other bits of 65 * the kernel to look at the other registers. 66 */ 67 #define ASP_INTERRUPT_ADDR 0xf0800000 68 69 static 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 #endif 112 113 out: 114 return ret; 115 } 116 117 static const struct parisc_device_id asp_tbl[] __initconst = { 118 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, 119 { 0, } 120 }; 121 MODULE_DEVICE_TABLE(parisc, asp_tbl); 122 123 static struct parisc_driver asp_driver __refdata = { 124 .name = "asp", 125 .id_table = asp_tbl, 126 .probe = asp_init_chip, 127 }; 128 129 static int __init asp_init(void) 130 { 131 return register_parisc_driver(&asp_driver); 132 } 133 arch_initcall(asp_init); 134