Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/parisc/asp.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 3601 byte(s)
Tag kernel26-2.6.12-alx-r9
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 | |
74 | int __init |
75 | asp_init_chip(struct parisc_device *dev) |
76 | { |
77 | struct gsc_irq gsc_irq; |
78 | int ret; |
79 | |
80 | asp.version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf; |
81 | asp.name = (asp.version == 1) ? "Asp" : "Cutoff"; |
82 | asp.hpa = ASP_INTERRUPT_ADDR; |
83 | |
84 | printk(KERN_INFO "%s version %d at 0x%lx found.\n", |
85 | asp.name, asp.version, dev->hpa); |
86 | |
87 | /* the IRQ ASP should use */ |
88 | ret = -EBUSY; |
89 | dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ); |
90 | if (dev->irq < 0) { |
91 | printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__); |
92 | goto out; |
93 | } |
94 | |
95 | asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; |
96 | |
97 | ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp); |
98 | if (ret < 0) |
99 | goto out; |
100 | |
101 | /* Program VIPER to interrupt on the ASP irq */ |
102 | gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD); |
103 | |
104 | /* Done init'ing, register this driver */ |
105 | ret = gsc_common_setup(dev, &asp); |
106 | if (ret) |
107 | goto out; |
108 | |
109 | gsc_fixup_irqs(dev, &asp, asp_choose_irq); |
110 | /* Mongoose is a sibling of Asp, not a child... */ |
111 | gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq); |
112 | |
113 | /* initialize the chassis LEDs */ |
114 | #ifdef CONFIG_CHASSIS_LCD_LED |
115 | register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, |
116 | ASP_LED_ADDR); |
117 | #endif |
118 | |
119 | out: |
120 | return ret; |
121 | } |
122 | |
123 | static struct parisc_device_id asp_tbl[] = { |
124 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 }, |
125 | { 0, } |
126 | }; |
127 | |
128 | struct parisc_driver asp_driver = { |
129 | .name = "Asp", |
130 | .id_table = asp_tbl, |
131 | .probe = asp_init_chip, |
132 | }; |