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133 lines · 3.5 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ASP Device Driver
4 *
5 * (c) Copyright 2000 The Puffin Group Inc.
6 *
7 * (c) 2000-2023 by Helge Deller <[email protected]>
8 */
9
10#include <linux/errno.h>
11#include <linux/init.h>
12#include <linux/interrupt.h>
13#include <linux/module.h>
14#include <linux/types.h>
15#include <asm/io.h>
16#include <asm/led.h>
17
18#include "gsc.h"
19
20#define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */
21
22#define ASP_VER_OFFSET 0x20 /* offset of ASP version */
23
24#define ASP_LED_ADDR 0xf0800020
25
26#define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */
27
28static struct gsc_asic asp;
29
30static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
31{
32 int irq;
33
34 switch (dev->id.sversion) {
35 case 0x71: irq = 9; break; /* SCSI */
36 case 0x72: irq = 8; break; /* LAN */
37 case 0x73: irq = 1; break; /* HIL */
38 case 0x74: irq = 7; break; /* Centronics */
39 case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
40 case 0x76: irq = 10; break; /* EISA BA */
41 case 0x77: irq = 11; break; /* Graphics1 */
42 case 0x7a: irq = 13; break; /* Audio (Bushmaster) */
43 case 0x7b: irq = 13; break; /* Audio (Scorpio) */
44 case 0x7c: irq = 3; break; /* FW SCSI */
45 case 0x7d: irq = 4; break; /* FDDI */
46 case 0x7f: irq = 13; break; /* Audio (Outfield) */
47 default: return; /* Unknown */
48 }
49
50 gsc_asic_assign_irq(ctrl, irq, &dev->irq);
51
52 switch (dev->id.sversion) {
53 case 0x73: irq = 2; break; /* i8042 High-priority */
54 case 0x76: irq = 0; break; /* EISA BA */
55 default: return; /* Other */
56 }
57
58 gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
59}
60
61/* There are two register ranges we're interested in. Interrupt /
62 * Status / LED are at 0xf080xxxx and Asp special registers are at
63 * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for
64 * the purposes of interrupt handling, we have to tell other bits of
65 * the kernel to look at the other registers.
66 */
67#define ASP_INTERRUPT_ADDR 0xf0800000
68
69static int __init asp_init_chip(struct parisc_device *dev)
70{
71 struct gsc_irq gsc_irq;
72 int ret;
73
74 asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
75 asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
76 asp.hpa = ASP_INTERRUPT_ADDR;
77
78 printk(KERN_INFO "%s version %d at 0x%lx found.\n",
79 asp.name, asp.version, (unsigned long)dev->hpa.start);
80
81 /* the IRQ ASP should use */
82 ret = -EBUSY;
83 dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
84 if (dev->irq < 0) {
85 printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
86 goto out;
87 }
88
89 asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
90
91 ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
92 if (ret < 0)
93 goto out;
94
95 /* Program VIPER to interrupt on the ASP irq */
96 gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
97
98 /* Done init'ing, register this driver */
99 ret = gsc_common_setup(dev, &asp);
100 if (ret)
101 goto out;
102
103 gsc_fixup_irqs(dev, &asp, asp_choose_irq);
104 /* Mongoose is a sibling of Asp, not a child... */
105 gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
106
107 /* initialize the chassis LEDs */
108#ifdef CONFIG_CHASSIS_LCD_LED
109 register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
110 ASP_LED_ADDR);
111#endif
112
113 out:
114 return ret;
115}
116
117static const struct parisc_device_id asp_tbl[] __initconst = {
118 { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
119 { 0, }
120};
121MODULE_DEVICE_TABLE(parisc, asp_tbl);
122
123static struct parisc_driver asp_driver __refdata = {
124 .name = "asp",
125 .id_table = asp_tbl,
126 .probe = asp_init_chip,
127};
128
129static int __init asp_init(void)
130{
131 return register_parisc_driver(&asp_driver);
132}
133arch_initcall(asp_init);