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Linux/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 };
240 

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