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
lasi_choose_irq(struct parisc_device * dev,void * ctrl)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
lasi_init_irq(struct gsc_asic * this_lasi)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
lasi_led_init(unsigned long lasi_hpa)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
lasi_power_off(void)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
lasi_init_chip(struct parisc_device * dev)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