1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * LASI Device Driver 4 * 5 * (c) Copyright 1999 Red Hat Software 6 * Portions (c) Copyright 1999 The Puffin Group Inc. 7 * Portions (c) Copyright 1999 Hewlett-Packard 8 * 9 * by Alan Cox <alan@redhat.com> and 10 * Alex deVries <alex@onefishtwo.ca> 11 */ 12 13 #include <linux/errno.h> 14 #include <linux/init.h> 15 #include <linux/interrupt.h> 16 #include <linux/slab.h> 17 #include <linux/module.h> 18 #include <linux/pm.h> 19 #include <linux/types.h> 20 #include <linux/reboot.h> 21 22 #include <asm/io.h> 23 #include <asm/hardware.h> 24 #include <asm/led.h> 25 26 #include "gsc.h" 27 28 29 #define LASI_VER 0xC008 /* LASI Version */ 30 31 #define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */ 32 #define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */ 33 34 static void lasi_choose_irq(struct parisc_device *dev, void *ctrl) 35 { 36 int irq; 37 38 switch (dev->id.sversion) { 39 case 0x74: irq = 7; break; /* Centronics */ 40 case 0x7B: irq = 13; break; /* Audio */ 41 case 0x81: irq = 14; break; /* Lasi itself */ 42 case 0x82: irq = 9; break; /* SCSI */ 43 case 0x83: irq = 20; break; /* Floppy */ 44 case 0x84: irq = 26; break; /* PS/2 Keyboard */ 45 case 0x87: irq = 18; break; /* ISDN */ 46 case 0x8A: irq = 8; break; /* LAN */ 47 case 0x8C: irq = 5; break; /* RS232 */ 48 case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break; 49 /* Telephone */ 50 default: return; /* unknown */ 51 } 52 53 gsc_asic_assign_irq(ctrl, irq, &dev->irq); 54 } 55 56 static void __init 57 lasi_init_irq(struct gsc_asic *this_lasi) 58 { 59 unsigned long lasi_base = this_lasi->hpa; 60 61 /* Stop LASI barking for a bit */ 62 gsc_writel(0x00000000, lasi_base+OFFSET_IMR); 63 64 /* clear pending interrupts */ 65 gsc_readl(lasi_base+OFFSET_IRR); 66 67 /* We're not really convinced we want to reset the onboard 68 * devices. Firmware does it for us... 69 */ 70 71 /* Resets */ 72 /* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/ /* Parallel */ 73 if(pdc_add_valid(lasi_base+0x4004) == PDC_OK) 74 gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */ 75 /* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/ /* Serial */ 76 /* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/ /* SCSI */ 77 gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */ 78 gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */ 79 gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */ 80 81 /* Ok we hit it on the head with a hammer, our Dog is now 82 ** comatose and muzzled. Devices will now unmask LASI 83 ** interrupts as they are registered as irq's in the LASI range. 84 */ 85 /* XXX: I thought it was `awks that got `it on the `ead with an 86 * `ammer. -- willy 87 */ 88 } 89 90 91 /* 92 ** lasi_led_init() 93 ** 94 ** lasi_led_init() initializes the LED controller on the LASI. 95 ** 96 ** Since Mirage and Electra machines use a different LED 97 ** address register, we need to check for these machines 98 ** explicitly. 99 */ 100 101 #ifndef CONFIG_CHASSIS_LCD_LED 102 103 #define lasi_led_init(x) /* nothing */ 104 105 #else 106 107 static void __init lasi_led_init(unsigned long lasi_hpa) 108 { 109 unsigned long datareg; 110 111 switch (CPU_HVERSION) { 112 /* Gecko machines have only one single LED, which can be permanently 113 turned on by writing a zero into the power control register. */ 114 case 0x600: /* Gecko (712/60) */ 115 case 0x601: /* Gecko (712/80) */ 116 case 0x602: /* Gecko (712/100) */ 117 case 0x603: /* Anole 64 (743/64) */ 118 case 0x604: /* Anole 100 (743/100) */ 119 case 0x605: /* Gecko (712/120) */ 120 datareg = lasi_hpa + 0x0000C000; 121 gsc_writeb(0, datareg); 122 return; /* no need to register the LED interrupt-function */ 123 124 /* Mirage and Electra machines need special offsets */ 125 case 0x60A: /* Mirage Jr (715/64) */ 126 case 0x60B: /* Mirage 100 */ 127 case 0x60C: /* Mirage 100+ */ 128 case 0x60D: /* Electra 100 */ 129 case 0x60E: /* Electra 120 */ 130 datareg = lasi_hpa - 0x00020000; 131 break; 132 133 default: 134 datareg = lasi_hpa + 0x0000C000; 135 break; 136 } 137 138 register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg); 139 } 140 #endif 141 142 /* 143 * lasi_power_off 144 * 145 * Function for lasi to turn off the power. This is accomplished by setting a 146 * 1 to PWR_ON_L in the Power Control Register 147 * 148 */ 149 static int lasi_power_off(struct sys_off_data *data) 150 { 151 struct gsc_asic *lasi = data->cb_data; 152 153 /* Power down the machine via Power Control Register */ 154 gsc_writel(0x02, lasi->hpa + 0x0000C000); 155 156 /* might not be reached: */ 157 return NOTIFY_DONE; 158 } 159 160 static int __init lasi_init_chip(struct parisc_device *dev) 161 { 162 struct gsc_asic *lasi; 163 int ret; 164 165 lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); 166 if (!lasi) 167 return -ENOMEM; 168 169 lasi->name = "Lasi"; 170 lasi->hpa = dev->hpa.start; 171 172 /* Check the 4-bit (yes, only 4) version register */ 173 lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf; 174 printk(KERN_INFO "%s version %d at 0x%lx found.\n", 175 lasi->name, lasi->version, lasi->hpa); 176 177 /* initialize the chassis LEDs really early */ 178 lasi_led_init(lasi->hpa); 179 180 /* Stop LASI barking for a bit */ 181 lasi_init_irq(lasi); 182 183 /* the IRQ lasi should use */ 184 dev->irq = gsc_alloc_irq(&lasi->gsc_irq); 185 if (dev->irq < 0) { 186 printk(KERN_ERR "%s(): cannot get GSC irq\n", 187 __func__); 188 kfree(lasi); 189 return -EBUSY; 190 } 191 192 lasi->eim = ((u32) lasi->gsc_irq.txn_addr) | lasi->gsc_irq.txn_data; 193 194 ret = request_irq(lasi->gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); 195 if (ret < 0) { 196 kfree(lasi); 197 return ret; 198 } 199 200 /* enable IRQ's for devices below LASI */ 201 gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR); 202 203 /* Done init'ing, register this driver */ 204 ret = gsc_common_setup(dev, lasi); 205 if (ret) { 206 kfree(lasi); 207 return ret; 208 } 209 210 gsc_fixup_irqs(dev, lasi, lasi_choose_irq); 211 212 /* register the LASI power off function */ 213 register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, 214 SYS_OFF_PRIO_DEFAULT, lasi_power_off, lasi); 215 216 return ret; 217 } 218 219 static struct parisc_device_id lasi_tbl[] __initdata = { 220 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 }, 221 { 0, } 222 }; 223 MODULE_DEVICE_TABLE(parisc, lasi_tbl); 224 225 static struct parisc_driver lasi_driver __refdata = { 226 .name = "lasi", 227 .id_table = lasi_tbl, 228 .probe = lasi_init_chip, 229 }; 230 231 static int __init lasi_init(void) 232 { 233 return register_parisc_driver(&lasi_driver); 234 } 235 arch_initcall(lasi_init); 236