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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * ASP Device Driver | |
4 | * | |
5 | * (c) Copyright 2000 The Puffin Group Inc. | |
6 | * | |
1da177e4 LT |
7 | * by Helge Deller <deller@gmx.de> |
8 | */ | |
9 | ||
10 | #include <linux/errno.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/module.h> | |
1da177e4 LT |
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 | ||
28 | static struct gsc_asic asp; | |
29 | ||
30 | static 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 | ||
df8e5bc6 | 69 | static int __init asp_init_chip(struct parisc_device *dev) |
1da177e4 LT |
70 | { |
71 | struct gsc_irq gsc_irq; | |
72 | int ret; | |
73 | ||
53f01bba | 74 | asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf; |
1da177e4 LT |
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", | |
c18b4608 | 79 | asp.name, asp.version, (unsigned long)dev->hpa.start); |
1da177e4 LT |
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) { | |
a8043ecb | 85 | printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); |
1da177e4 LT |
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 | ||
cfe4fbfb | 117 | static const struct parisc_device_id asp_tbl[] __initconst = { |
1da177e4 LT |
118 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, |
119 | { 0, } | |
120 | }; | |
121 | ||
cfe4fbfb | 122 | struct parisc_driver asp_driver __refdata = { |
bdad1f83 | 123 | .name = "asp", |
1da177e4 LT |
124 | .id_table = asp_tbl, |
125 | .probe = asp_init_chip, | |
126 | }; |