aboutsummaryrefslogtreecommitdiff
path: root/drivers/parisc/lasi.c
blob: 4e4fd12c2112ea805783313567a4dacddc1c52e1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	LASI Device Driver
 *
 *	(c) Copyright 1999 Red Hat Software
 *	Portions (c) Copyright 1999 The Puffin Group Inc.
 *	Portions (c) Copyright 1999 Hewlett-Packard
 *
 *	by Alan Cox <alan@redhat.com> and 
 * 	   Alex deVries <alex@onefishtwo.ca>
 */

#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/types.h>

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/led.h>

#include "gsc.h"


#define LASI_VER	0xC008	/* LASI Version */

#define LASI_IO_CONF	0x7FFFE	/* LASI primary configuration register */
#define LASI_IO_CONF2	0x7FFFF	/* LASI secondary configuration register */

static void lasi_choose_irq(struct parisc_device *dev, void *ctrl)
{
	int irq;

	switch (dev->id.sversion) {
		case 0x74:	irq =  7; break; /* Centronics */
		case 0x7B:	irq = 13; break; /* Audio */
		case 0x81:	irq = 14; break; /* Lasi itself */
		case 0x82:	irq =  9; break; /* SCSI */
		case 0x83:	irq = 20; break; /* Floppy */
		case 0x84:	irq = 26; break; /* PS/2 Keyboard */
		case 0x87:	irq = 18; break; /* ISDN */
		case 0x8A:	irq =  8; break; /* LAN */
		case 0x8C:	irq =  5; break; /* RS232 */
		case 0x8D:	irq = (dev->hw_path == 13) ? 16 : 17; break;
						 /* Telephone */
		default: 	return;		 /* unknown */
	}

	gsc_asic_assign_irq(ctrl, irq, &dev->irq);
}

static void __init
lasi_init_irq(struct gsc_asic *this_lasi)
{
	unsigned long lasi_base = this_lasi->hpa;

	/* Stop LASI barking for a bit */
	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);

	/* clear pending interrupts */
	gsc_readl(lasi_base+OFFSET_IRR);

	/* We're not really convinced we want to reset the onboard
         * devices. Firmware does it for us...
	 */

	/* Resets */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/	/* Parallel */
	if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
		gsc_writel(0xFFFFFFFF, lasi_base+0x4004);	/* Audio */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/	/* Serial */ 
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/	/* SCSI */
	gsc_writel(0xFFFFFFFF, lasi_base+0x7000);	/* LAN */
	gsc_writel(0xFFFFFFFF, lasi_base+0x8000);	/* Keyboard */
	gsc_writel(0xFFFFFFFF, lasi_base+0xA000);	/* FDC */
	
	/* Ok we hit it on the head with a hammer, our Dog is now
	** comatose and muzzled.  Devices will now unmask LASI
	** interrupts as they are registered as irq's in the LASI range.
	*/
	/* XXX: I thought it was `awks that got `it on the `ead with an
	 * `ammer.  -- willy
	 */
}


/*
   ** lasi_led_init()
   ** 
   ** lasi_led_init() initializes the LED controller on the LASI.
   **
   ** Since Mirage and Electra machines use a different LED
   ** address register, we need to check for these machines 
   ** explicitly.
 */

#ifndef CONFIG_CHASSIS_LCD_LED

#define lasi_led_init(x)	/* nothing */

#else

static void __init lasi_led_init(unsigned long lasi_hpa)
{
	unsigned long datareg;

	switch (CPU_HVERSION) {
	/* Gecko machines have only one single LED, which can be permanently 
	   turned on by writing a zero into the power control register. */ 
	case 0x600:		/* Gecko (712/60) */
	case 0x601:		/* Gecko (712/80) */
	case 0x602:		/* Gecko (712/100) */
	case 0x603:		/* Anole 64 (743/64) */
	case 0x604:		/* Anole 100 (743/100) */
	case 0x605:		/* Gecko (712/120) */
		datareg = lasi_hpa + 0x0000C000;
		gsc_writeb(0, datareg);
		return; /* no need to register the LED interrupt-function */  

	/* Mirage and Electra machines need special offsets */
	case 0x60A:		/* Mirage Jr (715/64) */
	case 0x60B:		/* Mirage 100 */
	case 0x60C:		/* Mirage 100+ */
	case 0x60D:		/* Electra 100 */
	case 0x60E:		/* Electra 120 */
		datareg = lasi_hpa - 0x00020000;
		break;

	default:
		datareg = lasi_hpa + 0x0000C000;
		break;
	}

	register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg);
}
#endif

/*
 * lasi_power_off
 *
 * Function for lasi to turn off the power.  This is accomplished by setting a
 * 1 to PWR_ON_L in the Power Control Register
 * 
 */

static unsigned long lasi_power_off_hpa __read_mostly;

static void lasi_power_off(void)
{
	unsigned long datareg;

	/* calculate addr of the Power Control Register */
	datareg = lasi_power_off_hpa + 0x0000C000;

	/* Power down the machine */
	gsc_writel(0x02, datareg);
}

static int __init lasi_init_chip(struct parisc_device *dev)
{
	extern void (*chassis_power_off)(void);
	struct gsc_asic *lasi;
	struct gsc_irq gsc_irq;
	int ret;

	lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
	if (!lasi)
		return -ENOMEM;

	lasi->name = "Lasi";
	lasi->hpa = dev->hpa.start;

	/* Check the 4-bit (yes, only 4) version register */
	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
		lasi->name, lasi->version, lasi->hpa);

	/* initialize the chassis LEDs really early */ 
	lasi_led_init(lasi->hpa);

	/* Stop LASI barking for a bit */
	lasi_init_irq(lasi);

	/* the IRQ lasi should use */
	dev->irq = gsc_alloc_irq(&gsc_irq);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(lasi);
		return -EBUSY;
	}

	lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
	if (ret < 0) {
		kfree(lasi);
		return ret;
	}

	/* enable IRQ's for devices below LASI */
	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, lasi);
	if (ret) {
		kfree(lasi);
		return ret;
	}    

	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);

	/* initialize the power off function */
	/* FIXME: Record the LASI HPA for the power off function.  This should
	 * ensure that only the first LASI (the one controlling the power off)
	 * should set the HPA here */
	lasi_power_off_hpa = lasi->hpa;
	chassis_power_off = lasi_power_off;
	
	return ret;
}

static struct parisc_device_id lasi_tbl[] __initdata = {
	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
	{ 0, }
};

struct parisc_driver lasi_driver __refdata = {
	.name =		"lasi",
	.id_table =	lasi_tbl,
	.probe =	lasi_init_chip,
};