kernel/2.6.29.6-aldebaran-rt/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/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 static 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 static int __init lasi_init_chip(struct parisc_device *dev)
 167 {
 168         extern void (*chassis_power_off)(void);
 169         struct gsc_asic *lasi;
 170         struct gsc_irq gsc_irq;
 171         int ret;
 172
 173         lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
 174         if (!lasi)
 175                 return -ENOMEM;
 176
 177         lasi->name = "Lasi";
 178         lasi->hpa = dev->hpa.start;
 179
 180         /* Check the 4-bit (yes, only 4) version register */
 181         lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
 182         printk(KERN_INFO "%s version %d at 0x%lx found.\n",
 183                 lasi->name, lasi->version, lasi->hpa);
 184
 185         /* initialize the chassis LEDs really early */
 186         lasi_led_init(lasi->hpa);
 187
 188         /* Stop LASI barking for a bit */
 189         lasi_init_irq(lasi);
 190
 191         /* the IRQ lasi should use */
 192         dev->irq = gsc_alloc_irq(&gsc_irq);
 193         if (dev->irq < 0) {
 194                 printk(KERN_ERR "%s(): cannot get GSC irq\n",
 195                                 __func__);
 196                 kfree(lasi);
 197                 return -EBUSY;
 198         }
 199
 200         lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
 201
 202         ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
 203         if (ret < 0) {
 204                 kfree(lasi);
 205                 return ret;
 206         }
 207
 208         /* enable IRQ's for devices below LASI */
 209         gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);
 210
 211         /* Done init'ing, register this driver */
 212         ret = gsc_common_setup(dev, lasi);
 213         if (ret) {
 214                 kfree(lasi);
 215                 return ret;
 216         }
 217
 218         gsc_fixup_irqs(dev, lasi, lasi_choose_irq);
 219
 220         /* initialize the power off function */
 221         /* FIXME: Record the LASI HPA for the power off function.  This should
 222          * ensure that only the first LASI (the one controlling the power off)
 223          * should set the HPA here */
 224         lasi_power_off_hpa = lasi->hpa;
 225         chassis_power_off = lasi_power_off;
 226
 227         return ret;
 228 }
 229
 230 static struct parisc_device_id lasi_tbl[] = {
 231         { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
 232         { 0, }
 233 };
 234
 235 struct parisc_driver lasi_driver = {
 236         .name =         "lasi",
 237         .id_table =     lasi_tbl,
 238         .probe =        lasi_init_chip,
 239 };