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 37 static 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 59 static void __init 60 lasi_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 109 110 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 */ 152 153 static unsigned long lasi_power_off_hpa __read_mostly; 154 155 static 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 } 165 166 int __init 167 lasi_init_chip(struct parisc_device *dev) 168 { 169 extern void (*chassis_power_off)(void); 170 struct gsc_asic *lasi; 171 struct gsc_irq gsc_irq; 172 int ret; 173 174 lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); 175 if (!lasi) 176 return -ENOMEM; 177 178 lasi->name = "Lasi"; 179 lasi->hpa = dev->hpa.start; 180 181 /* Check the 4-bit (yes, only 4) version register */ 182 lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf; 183 printk(KERN_INFO "%s version %d at 0x%lx found.\n", 184 lasi->name, lasi->version, lasi->hpa); 185 186 /* initialize the chassis LEDs really early */ 187 lasi_led_init(lasi->hpa); 188 189 /* Stop LASI barking for a bit */ 190 lasi_init_irq(lasi); 191 192 /* the IRQ lasi should use */ 193 dev->irq = gsc_alloc_irq(&gsc_irq); 194 if (dev->irq < 0) { 195 printk(KERN_ERR "%s(): cannot get GSC irq\n", 196 __func__); 197 kfree(lasi); 198 return -EBUSY; 199 } 200 201 lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; 202 203 ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); 204 if (ret < 0) { 205 kfree(lasi); 206 return ret; 207 } 208 209 /* enable IRQ's for devices below LASI */ 210 gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR); 211 212 /* Done init'ing, register this driver */ 213 ret = gsc_common_setup(dev, lasi); 214 if (ret) { 215 kfree(lasi); 216 return ret; 217 } 218 219 gsc_fixup_irqs(dev, lasi, lasi_choose_irq); 220 221 /* initialize the power off function */ 222 /* FIXME: Record the LASI HPA for the power off function. This should 223 * ensure that only the first LASI (the one controlling the power off) 224 * should set the HPA here */ 225 lasi_power_off_hpa = lasi->hpa; 226 chassis_power_off = lasi_power_off; 227 228 return ret; 229 } 230 231 static struct parisc_device_id lasi_tbl[] = { 232 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 }, 233 { 0, } 234 }; 235 236 struct parisc_driver lasi_driver = { 237 .name = "lasi", 238 .id_table = lasi_tbl, 239 .probe = lasi_init_chip, 240 }; 241