Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * WAX Device Driver | |
4 | * | |
5 | * (c) Copyright 2000 The Puffin Group Inc. | |
6 | * | |
ac65d9c9 | 7 | * (c) 2000-2023 by Helge Deller <deller@gmx.de> |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/errno.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/ioport.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
17 | ||
18 | #include <asm/io.h> | |
19 | #include <asm/hardware.h> | |
20 | ||
21 | #include "gsc.h" | |
22 | ||
23 | #define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */ | |
24 | ||
25 | static void wax_choose_irq(struct parisc_device *dev, void *ctrl) | |
26 | { | |
27 | int irq; | |
28 | ||
29 | switch (dev->id.sversion) { | |
30 | case 0x73: irq = 1; break; /* i8042 General */ | |
31 | case 0x8c: irq = 6; break; /* Serial */ | |
32 | case 0x90: irq = 10; break; /* EISA */ | |
33 | default: return; /* Unknown */ | |
34 | } | |
35 | ||
36 | gsc_asic_assign_irq(ctrl, irq, &dev->irq); | |
37 | ||
38 | switch (dev->id.sversion) { | |
39 | case 0x73: irq = 2; break; /* i8042 High-priority */ | |
40 | case 0x90: irq = 0; break; /* EISA NMI */ | |
41 | default: return; /* No secondary IRQ */ | |
42 | } | |
43 | ||
44 | gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq); | |
45 | } | |
46 | ||
47 | static void __init | |
48 | wax_init_irq(struct gsc_asic *wax) | |
49 | { | |
50 | unsigned long base = wax->hpa; | |
51 | ||
52 | /* Wax-off */ | |
53 | gsc_writel(0x00000000, base+OFFSET_IMR); | |
54 | ||
55 | /* clear pending interrupts */ | |
56 | gsc_readl(base+OFFSET_IRR); | |
57 | ||
58 | /* We're not really convinced we want to reset the onboard | |
59 | * devices. Firmware does it for us... | |
60 | */ | |
61 | ||
62 | /* Resets */ | |
63 | // gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */ | |
64 | // gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */ | |
65 | } | |
66 | ||
df8e5bc6 | 67 | static int __init wax_init_chip(struct parisc_device *dev) |
1da177e4 LT |
68 | { |
69 | struct gsc_asic *wax; | |
70 | struct parisc_device *parent; | |
1da177e4 LT |
71 | int ret; |
72 | ||
cb6fc18e | 73 | wax = kzalloc(sizeof(*wax), GFP_KERNEL); |
1da177e4 LT |
74 | if (!wax) |
75 | return -ENOMEM; | |
76 | ||
77 | wax->name = "wax"; | |
53f01bba | 78 | wax->hpa = dev->hpa.start; |
1da177e4 LT |
79 | |
80 | wax->version = 0; /* gsc_readb(wax->hpa+WAX_VER); */ | |
81 | printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa); | |
82 | ||
83 | /* Stop wax hissing for a bit */ | |
84 | wax_init_irq(wax); | |
85 | ||
86 | /* the IRQ wax should use */ | |
939fc856 | 87 | dev->irq = gsc_claim_irq(&wax->gsc_irq, WAX_GSC_IRQ); |
1da177e4 LT |
88 | if (dev->irq < 0) { |
89 | printk(KERN_ERR "%s(): cannot get GSC irq\n", | |
a8043ecb | 90 | __func__); |
1da177e4 LT |
91 | kfree(wax); |
92 | return -EBUSY; | |
93 | } | |
94 | ||
939fc856 | 95 | wax->eim = ((u32) wax->gsc_irq.txn_addr) | wax->gsc_irq.txn_data; |
1da177e4 | 96 | |
939fc856 | 97 | ret = request_irq(wax->gsc_irq.irq, gsc_asic_intr, 0, "wax", wax); |
1da177e4 LT |
98 | if (ret < 0) { |
99 | kfree(wax); | |
100 | return ret; | |
101 | } | |
102 | ||
103 | /* enable IRQ's for devices below WAX */ | |
104 | gsc_writel(wax->eim, wax->hpa + OFFSET_IAR); | |
105 | ||
106 | /* Done init'ing, register this driver */ | |
107 | ret = gsc_common_setup(dev, wax); | |
108 | if (ret) { | |
109 | kfree(wax); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | gsc_fixup_irqs(dev, wax, wax_choose_irq); | |
114 | /* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */ | |
115 | parent = parisc_parent(dev); | |
116 | if (parent->id.hw_type != HPHW_IOA) { | |
117 | gsc_fixup_irqs(parent, wax, wax_choose_irq); | |
118 | } | |
119 | ||
120 | return ret; | |
121 | } | |
122 | ||
cfe4fbfb | 123 | static const struct parisc_device_id wax_tbl[] __initconst = { |
ac65d9c9 | 124 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e }, |
1da177e4 LT |
125 | { 0, } |
126 | }; | |
127 | ||
128 | MODULE_DEVICE_TABLE(parisc, wax_tbl); | |
129 | ||
ac65d9c9 | 130 | static struct parisc_driver wax_driver __refdata = { |
1da177e4 LT |
131 | .name = "wax", |
132 | .id_table = wax_tbl, | |
133 | .probe = wax_init_chip, | |
134 | }; | |
ac65d9c9 HD |
135 | |
136 | static int __init wax_init(void) | |
137 | { | |
138 | return register_parisc_driver(&wax_driver); | |
139 | } | |
140 | arch_initcall(wax_init); |