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