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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
38static 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
60static void __init
61lasi_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
111void __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
154static unsigned long lasi_power_off_hpa;
155
156static 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
167int __init
168lasi_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
231static struct parisc_device_id lasi_tbl[] = {
232 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
233 { 0, }
234};
235
236struct parisc_driver lasi_driver = {
237 .name = "Lasi",
238 .id_table = lasi_tbl,
239 .probe = lasi_init_chip,
240};