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