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1da177e4 LT |
1 | /* |
2 | * ASP Device Driver | |
3 | * | |
4 | * (c) Copyright 2000 The Puffin Group Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * by Helge Deller <deller@gmx.de> | |
12 | */ | |
13 | ||
14 | #include <linux/errno.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/types.h> | |
20 | #include <asm/io.h> | |
21 | #include <asm/led.h> | |
22 | ||
23 | #include "gsc.h" | |
24 | ||
25 | #define ASP_GSC_IRQ 3 /* hardcoded interrupt for GSC */ | |
26 | ||
27 | #define ASP_VER_OFFSET 0x20 /* offset of ASP version */ | |
28 | ||
29 | #define ASP_LED_ADDR 0xf0800020 | |
30 | ||
31 | #define VIPER_INT_WORD 0xFFFBF088 /* addr of viper interrupt word */ | |
32 | ||
33 | static struct gsc_asic asp; | |
34 | ||
35 | static void asp_choose_irq(struct parisc_device *dev, void *ctrl) | |
36 | { | |
37 | int irq; | |
38 | ||
39 | switch (dev->id.sversion) { | |
40 | case 0x71: irq = 9; break; /* SCSI */ | |
41 | case 0x72: irq = 8; break; /* LAN */ | |
42 | case 0x73: irq = 1; break; /* HIL */ | |
43 | case 0x74: irq = 7; break; /* Centronics */ | |
44 | case 0x75: irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */ | |
45 | case 0x76: irq = 10; break; /* EISA BA */ | |
46 | case 0x77: irq = 11; break; /* Graphics1 */ | |
47 | case 0x7a: irq = 13; break; /* Audio (Bushmaster) */ | |
48 | case 0x7b: irq = 13; break; /* Audio (Scorpio) */ | |
49 | case 0x7c: irq = 3; break; /* FW SCSI */ | |
50 | case 0x7d: irq = 4; break; /* FDDI */ | |
51 | case 0x7f: irq = 13; break; /* Audio (Outfield) */ | |
52 | default: return; /* Unknown */ | |
53 | } | |
54 | ||
55 | gsc_asic_assign_irq(ctrl, irq, &dev->irq); | |
56 | ||
57 | switch (dev->id.sversion) { | |
58 | case 0x73: irq = 2; break; /* i8042 High-priority */ | |
59 | case 0x76: irq = 0; break; /* EISA BA */ | |
60 | default: return; /* Other */ | |
61 | } | |
62 | ||
63 | gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); | |
64 | } | |
65 | ||
66 | /* There are two register ranges we're interested in. Interrupt / | |
67 | * Status / LED are at 0xf080xxxx and Asp special registers are at | |
68 | * 0xf082fxxx. PDC only tells us that Asp is at 0xf082f000, so for | |
69 | * the purposes of interrupt handling, we have to tell other bits of | |
70 | * the kernel to look at the other registers. | |
71 | */ | |
72 | #define ASP_INTERRUPT_ADDR 0xf0800000 | |
73 | ||
df8e5bc6 | 74 | static int __init asp_init_chip(struct parisc_device *dev) |
1da177e4 LT |
75 | { |
76 | struct gsc_irq gsc_irq; | |
77 | int ret; | |
78 | ||
53f01bba | 79 | asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf; |
1da177e4 LT |
80 | asp.name = (asp.version == 1) ? "Asp" : "Cutoff"; |
81 | asp.hpa = ASP_INTERRUPT_ADDR; | |
82 | ||
83 | printk(KERN_INFO "%s version %d at 0x%lx found.\n", | |
53f01bba | 84 | asp.name, asp.version, dev->hpa.start); |
1da177e4 LT |
85 | |
86 | /* the IRQ ASP should use */ | |
87 | ret = -EBUSY; | |
88 | dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ); | |
89 | if (dev->irq < 0) { | |
a8043ecb | 90 | printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); |
1da177e4 LT |
91 | goto out; |
92 | } | |
93 | ||
94 | asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; | |
95 | ||
96 | ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp); | |
97 | if (ret < 0) | |
98 | goto out; | |
99 | ||
100 | /* Program VIPER to interrupt on the ASP irq */ | |
101 | gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD); | |
102 | ||
103 | /* Done init'ing, register this driver */ | |
104 | ret = gsc_common_setup(dev, &asp); | |
105 | if (ret) | |
106 | goto out; | |
107 | ||
108 | gsc_fixup_irqs(dev, &asp, asp_choose_irq); | |
109 | /* Mongoose is a sibling of Asp, not a child... */ | |
110 | gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq); | |
111 | ||
112 | /* initialize the chassis LEDs */ | |
113 | #ifdef CONFIG_CHASSIS_LCD_LED | |
114 | register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, | |
115 | ASP_LED_ADDR); | |
116 | #endif | |
117 | ||
118 | out: | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static struct parisc_device_id asp_tbl[] = { | |
123 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, | |
124 | { 0, } | |
125 | }; | |
126 | ||
127 | struct parisc_driver asp_driver = { | |
bdad1f83 | 128 | .name = "asp", |
1da177e4 LT |
129 | .id_table = asp_tbl, |
130 | .probe = asp_init_chip, | |
131 | }; |