1/* 2 * LASI Device Driver 3 * 4 * (c) Copyright 1999 Red Hat Software 5 * Portions (c) Copyright 1999 The Puffin Group Inc. 6 * Portions (c) Copyright 1999 Hewlett-Packard 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * by Alan Cox <alan@redhat.com> and 14 * Alex deVries <alex@onefishtwo.ca> 15 */ 16 17#include <linux/errno.h> 18#include <linux/init.h> 19#include <linux/interrupt.h> 20#include <linux/slab.h> 21#include <linux/module.h> 22#include <linux/pm.h> 23#include <linux/types.h> 24 25#include <asm/io.h> 26#include <asm/hardware.h> 27#include <asm/led.h> 28 29#include "gsc.h" 30 31 32#define LASI_VER 0xC008 /* LASI Version */ 33 34#define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */ 35#define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */ 36 37static void lasi_choose_irq(struct parisc_device *dev, void *ctrl) 38{ 39 int irq; 40 41 switch (dev->id.sversion) { 42 case 0x74: irq = 7; break; /* Centronics */ 43 case 0x7B: irq = 13; break; /* Audio */ 44 case 0x81: irq = 14; break; /* Lasi itself */ 45 case 0x82: irq = 9; break; /* SCSI */ 46 case 0x83: irq = 20; break; /* Floppy */ 47 case 0x84: irq = 26; break; /* PS/2 Keyboard */ 48 case 0x87: irq = 18; break; /* ISDN */ 49 case 0x8A: irq = 8; break; /* LAN */ 50 case 0x8C: irq = 5; break; /* RS232 */ 51 case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break; 52 /* Telephone */ 53 default: return; /* unknown */ 54 } 55 56 gsc_asic_assign_irq(ctrl, irq, &dev->irq); 57} 58 59static void __init 60lasi_init_irq(struct gsc_asic *this_lasi) 61{ 62 unsigned long lasi_base = this_lasi->hpa; 63 64 /* Stop LASI barking for a bit */ 65 gsc_writel(0x00000000, lasi_base+OFFSET_IMR); 66 67 /* clear pending interrupts */ 68 gsc_readl(lasi_base+OFFSET_IRR); 69 70 /* We're not really convinced we want to reset the onboard 71 * devices. Firmware does it for us... 72 */ 73 74 /* Resets */ 75 /* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/ /* Parallel */ 76 if(pdc_add_valid(lasi_base+0x4004) == PDC_OK) 77 gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */ 78 /* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/ /* Serial */ 79 /* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/ /* SCSI */ 80 gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */ 81 gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */ 82 gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */ 83 84 /* Ok we hit it on the head with a hammer, our Dog is now 85 ** comatose and muzzled. Devices will now unmask LASI 86 ** interrupts as they are registered as irq's in the LASI range. 87 */ 88 /* XXX: I thought it was `awks that got `it on the `ead with an 89 * `ammer. -- willy 90 */ 91} 92 93 94/* 95 ** lasi_led_init() 96 ** 97 ** lasi_led_init() initializes the LED controller on the LASI. 98 ** 99 ** Since Mirage and Electra machines use a different LED 100 ** address register, we need to check for these machines 101 ** explicitly. 102 */ 103 104#ifndef CONFIG_CHASSIS_LCD_LED 105 106#define lasi_led_init(x) /* nothing */ 107 108#else 109 110static void __init lasi_led_init(unsigned long lasi_hpa) 111{ 112 unsigned long datareg; 113 114 switch (CPU_HVERSION) { 115 /* Gecko machines have only one single LED, which can be permanently 116 turned on by writing a zero into the power control register. */ 117 case 0x600: /* Gecko (712/60) */ 118 case 0x601: /* Gecko (712/80) */ 119 case 0x602: /* Gecko (712/100) */ 120 case 0x603: /* Anole 64 (743/64) */ 121 case 0x604: /* Anole 100 (743/100) */ 122 case 0x605: /* Gecko (712/120) */ 123 datareg = lasi_hpa + 0x0000C000; 124 gsc_writeb(0, datareg); 125 return; /* no need to register the LED interrupt-function */ 126 127 /* Mirage and Electra machines need special offsets */ 128 case 0x60A: /* Mirage Jr (715/64) */ 129 case 0x60B: /* Mirage 100 */ 130 case 0x60C: /* Mirage 100+ */ 131 case 0x60D: /* Electra 100 */ 132 case 0x60E: /* Electra 120 */ 133 datareg = lasi_hpa - 0x00020000; 134 break; 135 136 default: 137 datareg = lasi_hpa + 0x0000C000; 138 break; 139 } 140 141 register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg); 142} 143#endif 144 145/* 146 * lasi_power_off 147 * 148 * Function for lasi to turn off the power. This is accomplished by setting a 149 * 1 to PWR_ON_L in the Power Control Register 150 * 151 */ 152 153static unsigned long lasi_power_off_hpa __read_mostly; 154 155static void lasi_power_off(void) 156{ 157 unsigned long datareg; 158 159 /* calculate addr of the Power Control Register */ 160 datareg = lasi_power_off_hpa + 0x0000C000; 161 162 /* Power down the machine */ 163 gsc_writel(0x02, datareg); 164} 165 166static int __init lasi_init_chip(struct parisc_device *dev) 167{ 168 extern void (*chassis_power_off)(void); 169 struct gsc_asic *lasi; 170 struct gsc_irq gsc_irq; 171 int ret; 172 173 lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); 174 if (!lasi) 175 return -ENOMEM; 176 177 lasi->name = "Lasi"; 178 lasi->hpa = dev->hpa.start; 179 180 /* Check the 4-bit (yes, only 4) version register */ 181 lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf; 182 printk(KERN_INFO "%s version %d at 0x%lx found.\n", 183 lasi->name, lasi->version, lasi->hpa); 184 185 /* initialize the chassis LEDs really early */ 186 lasi_led_init(lasi->hpa); 187 188 /* Stop LASI barking for a bit */ 189 lasi_init_irq(lasi); 190 191 /* the IRQ lasi should use */ 192 dev->irq = gsc_alloc_irq(&gsc_irq); 193 if (dev->irq < 0) { 194 printk(KERN_ERR "%s(): cannot get GSC irq\n", 195 __func__); 196 kfree(lasi); 197 return -EBUSY; 198 } 199 200 lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; 201 202 ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); 203 if (ret < 0) { 204 kfree(lasi); 205 return ret; 206 } 207 208 /* enable IRQ's for devices below LASI */ 209 gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR); 210 211 /* Done init'ing, register this driver */ 212 ret = gsc_common_setup(dev, lasi); 213 if (ret) { 214 kfree(lasi); 215 return ret; 216 } 217 218 gsc_fixup_irqs(dev, lasi, lasi_choose_irq); 219 220 /* initialize the power off function */ 221 /* FIXME: Record the LASI HPA for the power off function. This should 222 * ensure that only the first LASI (the one controlling the power off) 223 * should set the HPA here */ 224 lasi_power_off_hpa = lasi->hpa; 225 chassis_power_off = lasi_power_off; 226 227 return ret; 228} 229 230static struct parisc_device_id lasi_tbl[] = { 231 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 }, 232 { 0, } 233}; 234 235struct parisc_driver lasi_driver = { 236 .name = "lasi", 237 .id_table = lasi_tbl, 238 .probe = lasi_init_chip, 239}; 240