1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ASP Device Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (c) Copyright 2000 The Puffin Group Inc.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * by Helge Deller <deller@gmx.de>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/interrupt.h>
13*4882a593Smuzhiyun #include <linux/module.h>
14*4882a593Smuzhiyun #include <linux/types.h>
15*4882a593Smuzhiyun #include <asm/io.h>
16*4882a593Smuzhiyun #include <asm/led.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include "gsc.h"
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define ASP_VER_OFFSET 0x20 /* offset of ASP version */
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define ASP_LED_ADDR 0xf0800020
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static struct gsc_asic asp;
29*4882a593Smuzhiyun
asp_choose_irq(struct parisc_device * dev,void * ctrl)30*4882a593Smuzhiyun static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun int irq;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun switch (dev->id.sversion) {
35*4882a593Smuzhiyun case 0x71: irq = 9; break; /* SCSI */
36*4882a593Smuzhiyun case 0x72: irq = 8; break; /* LAN */
37*4882a593Smuzhiyun case 0x73: irq = 1; break; /* HIL */
38*4882a593Smuzhiyun case 0x74: irq = 7; break; /* Centronics */
39*4882a593Smuzhiyun case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
40*4882a593Smuzhiyun case 0x76: irq = 10; break; /* EISA BA */
41*4882a593Smuzhiyun case 0x77: irq = 11; break; /* Graphics1 */
42*4882a593Smuzhiyun case 0x7a: irq = 13; break; /* Audio (Bushmaster) */
43*4882a593Smuzhiyun case 0x7b: irq = 13; break; /* Audio (Scorpio) */
44*4882a593Smuzhiyun case 0x7c: irq = 3; break; /* FW SCSI */
45*4882a593Smuzhiyun case 0x7d: irq = 4; break; /* FDDI */
46*4882a593Smuzhiyun case 0x7f: irq = 13; break; /* Audio (Outfield) */
47*4882a593Smuzhiyun default: return; /* Unknown */
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun gsc_asic_assign_irq(ctrl, irq, &dev->irq);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun switch (dev->id.sversion) {
53*4882a593Smuzhiyun case 0x73: irq = 2; break; /* i8042 High-priority */
54*4882a593Smuzhiyun case 0x76: irq = 0; break; /* EISA BA */
55*4882a593Smuzhiyun default: return; /* Other */
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun /* There are two register ranges we're interested in. Interrupt /
62*4882a593Smuzhiyun * Status / LED are at 0xf080xxxx and Asp special registers are at
63*4882a593Smuzhiyun * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for
64*4882a593Smuzhiyun * the purposes of interrupt handling, we have to tell other bits of
65*4882a593Smuzhiyun * the kernel to look at the other registers.
66*4882a593Smuzhiyun */
67*4882a593Smuzhiyun #define ASP_INTERRUPT_ADDR 0xf0800000
68*4882a593Smuzhiyun
asp_init_chip(struct parisc_device * dev)69*4882a593Smuzhiyun static int __init asp_init_chip(struct parisc_device *dev)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun struct gsc_irq gsc_irq;
72*4882a593Smuzhiyun int ret;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
75*4882a593Smuzhiyun asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
76*4882a593Smuzhiyun asp.hpa = ASP_INTERRUPT_ADDR;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun printk(KERN_INFO "%s version %d at 0x%lx found.\n",
79*4882a593Smuzhiyun asp.name, asp.version, (unsigned long)dev->hpa.start);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /* the IRQ ASP should use */
82*4882a593Smuzhiyun ret = -EBUSY;
83*4882a593Smuzhiyun dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
84*4882a593Smuzhiyun if (dev->irq < 0) {
85*4882a593Smuzhiyun printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
86*4882a593Smuzhiyun goto out;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
92*4882a593Smuzhiyun if (ret < 0)
93*4882a593Smuzhiyun goto out;
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun /* Program VIPER to interrupt on the ASP irq */
96*4882a593Smuzhiyun gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun /* Done init'ing, register this driver */
99*4882a593Smuzhiyun ret = gsc_common_setup(dev, &asp);
100*4882a593Smuzhiyun if (ret)
101*4882a593Smuzhiyun goto out;
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun gsc_fixup_irqs(dev, &asp, asp_choose_irq);
104*4882a593Smuzhiyun /* Mongoose is a sibling of Asp, not a child... */
105*4882a593Smuzhiyun gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun /* initialize the chassis LEDs */
108*4882a593Smuzhiyun #ifdef CONFIG_CHASSIS_LCD_LED
109*4882a593Smuzhiyun register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
110*4882a593Smuzhiyun ASP_LED_ADDR);
111*4882a593Smuzhiyun #endif
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun out:
114*4882a593Smuzhiyun return ret;
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun static const struct parisc_device_id asp_tbl[] __initconst = {
118*4882a593Smuzhiyun { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
119*4882a593Smuzhiyun { 0, }
120*4882a593Smuzhiyun };
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun struct parisc_driver asp_driver __refdata = {
123*4882a593Smuzhiyun .name = "asp",
124*4882a593Smuzhiyun .id_table = asp_tbl,
125*4882a593Smuzhiyun .probe = asp_init_chip,
126*4882a593Smuzhiyun };
127