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