drivers/parisc/lasi.c

   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/slab.h>
  24 #include <linux/types.h>
  25
  26 #include <asm/io.h>
  27 #include <asm/hardware.h>
  28 #include <asm/led.h>
  29
  30 #include "gsc.h"
  31
  32
  33 #define LASI_VER        0xC008  /* LASI Version */
  34
  35 #define LASI_IO_CONF    0x7FFFE /* LASI primary configuration register */
  36 #define LASI_IO_CONF2   0x7FFFF /* LASI secondary configuration register */
  37
  38 static void lasi_choose_irq(struct parisc_device *dev, void *ctrl)
  39 {
  40         int irq;
  41
  42         switch (dev->id.sversion) {
  43                 case 0x74:      irq =  7; break; /* Centronics */
  44                 case 0x7B:      irq = 13; break; /* Audio */
  45                 case 0x81:      irq = 14; break; /* Lasi itself */
  46                 case 0x82:      irq =  9; break; /* SCSI */
  47                 case 0x83:      irq = 20; break; /* Floppy */
  48                 case 0x84:      irq = 26; break; /* PS/2 Keyboard */
  49                 case 0x87:      irq = 18; break; /* ISDN */
  50                 case 0x8A:      irq =  8; break; /* LAN */
  51                 case 0x8C:      irq =  5; break; /* RS232 */
  52                 case 0x8D:      irq = (dev->hw_path == 13) ? 16 : 17; break;
  53                                                  /* Telephone */
  54                 default:        return;          /* unknown */
  55         }
  56
  57         gsc_asic_assign_irq(ctrl, irq, &dev->irq);
  58 }
  59
  60 static void __init
  61 lasi_init_irq(struct gsc_asic *this_lasi)
  62 {
  63         unsigned long lasi_base = this_lasi->hpa;
  64
  65         /* Stop LASI barking for a bit */
  66         gsc_writel(0x00000000, lasi_base+OFFSET_IMR);
  67
  68         /* clear pending interrupts */
  69         gsc_readl(lasi_base+OFFSET_IRR);
  70
  71         /* We're not really convinced we want to reset the onboard
  72          * devices. Firmware does it for us...
  73          */
  74
  75         /* Resets */
  76         /* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/  /* Parallel */
  77         if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
  78                 gsc_writel(0xFFFFFFFF, lasi_base+0x4004);       /* Audio */
  79         /* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/  /* Serial */
  80         /* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/  /* SCSI */
  81         gsc_writel(0xFFFFFFFF, lasi_base+0x7000);       /* LAN */
  82         gsc_writel(0xFFFFFFFF, lasi_base+0x8000);       /* Keyboard */
  83         gsc_writel(0xFFFFFFFF, lasi_base+0xA000);       /* FDC */
  84
  85         /* Ok we hit it on the head with a hammer, our Dog is now
  86         ** comatose and muzzled.  Devices will now unmask LASI
  87         ** interrupts as they are registered as irq's in the LASI range.
  88         */
  89         /* XXX: I thought it was `awks that got `it on the `ead with an
  90          * `ammer.  -- willy
  91          */
  92 }
  93
  94
  95 /*
  96    ** lasi_led_init()
  97    **
  98    ** lasi_led_init() initializes the LED controller on the LASI.
  99    **
 100    ** Since Mirage and Electra machines use a different LED
 101    ** address register, we need to check for these machines
 102    ** explicitly.
 103  */
 104
 105 #ifndef CONFIG_CHASSIS_LCD_LED
 106
 107 #define lasi_led_init(x)        /* nothing */
 108
 109 #else
 110
 111 void __init lasi_led_init(unsigned long lasi_hpa)
 112 {
 113         unsigned long datareg;
 114
 115         switch (CPU_HVERSION) {
 116         /* Gecko machines have only one single LED, which can be permanently
 117            turned on by writing a zero into the power control register. */
 118         case 0x600:             /* Gecko (712/60) */
 119         case 0x601:             /* Gecko (712/80) */
 120         case 0x602:             /* Gecko (712/100) */
 121         case 0x603:             /* Anole 64 (743/64) */
 122         case 0x604:             /* Anole 100 (743/100) */
 123         case 0x605:             /* Gecko (712/120) */
 124                 datareg = lasi_hpa + 0x0000C000;
 125                 gsc_writeb(0, datareg);
 126                 return; /* no need to register the LED interrupt-function */
 127
 128         /* Mirage and Electra machines need special offsets */
 129         case 0x60A:             /* Mirage Jr (715/64) */
 130         case 0x60B:             /* Mirage 100 */
 131         case 0x60C:             /* Mirage 100+ */
 132         case 0x60D:             /* Electra 100 */
 133         case 0x60E:             /* Electra 120 */
 134                 datareg = lasi_hpa - 0x00020000;
 135                 break;
 136
 137         default:
 138                 datareg = lasi_hpa + 0x0000C000;
 139                 break;
 140         }
 141
 142         register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg);
 143 }
 144 #endif
 145
 146 /*
 147  * lasi_power_off
 148  *
 149  * Function for lasi to turn off the power.  This is accomplished by setting a
 150  * 1 to PWR_ON_L in the Power Control Register
 151  *
 152  */
 153
 154 static unsigned long lasi_power_off_hpa;
 155
 156 static void lasi_power_off(void)
 157 {
 158         unsigned long datareg;
 159
 160         /* calculate addr of the Power Control Register */
 161         datareg = lasi_power_off_hpa + 0x0000C000;
 162
 163         /* Power down the machine */
 164         gsc_writel(0x02, datareg);
 165 }
 166
 167 int __init
 168 lasi_init_chip(struct parisc_device *dev)
 169 {
 170         struct gsc_asic *lasi;
 171         struct gsc_irq gsc_irq;
 172         int ret;
 173
 174         lasi = kmalloc(sizeof(*lasi), GFP_KERNEL);
 175         if (!lasi)
 176                 return -ENOMEM;
 177
 178         lasi->name = "Lasi";
 179         lasi->hpa = dev->hpa;
 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                                 __FUNCTION__);
 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         pm_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 };