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8cc72361 WYC |
1 | /** |
2 | * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. | |
3 | * | |
4 | * This source file is released under GPL v2 license (no other versions). | |
5 | * See the COPYING file included in the main directory of this source | |
6 | * distribution for the license terms and conditions. | |
7 | * | |
8 | * @File cthardware.c | |
9 | * | |
10 | * @Brief | |
11 | * This file contains the implementation of hardware access methord. | |
12 | * | |
13 | * @Author Liu Chun | |
14 | * @Date Jun 26 2008 | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "cthardware.h" | |
19 | #include "cthw20k1.h" | |
20 | #include "cthw20k2.h" | |
21 | #include <linux/bug.h> | |
22 | ||
e23e7a14 BP |
23 | int create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type, |
24 | enum CTCARDS model, struct hw **rhw) | |
8cc72361 | 25 | { |
514eef9c | 26 | int err; |
8cc72361 | 27 | |
9470195a TI |
28 | switch (chip_type) { |
29 | case ATC20K1: | |
8cc72361 WYC |
30 | err = create_20k1_hw_obj(rhw); |
31 | break; | |
9470195a | 32 | case ATC20K2: |
8cc72361 WYC |
33 | err = create_20k2_hw_obj(rhw); |
34 | break; | |
35 | default: | |
36 | err = -ENODEV; | |
37 | break; | |
38 | } | |
39 | if (err) | |
40 | return err; | |
41 | ||
42 | (*rhw)->pci = pci; | |
9470195a TI |
43 | (*rhw)->chip_type = chip_type; |
44 | (*rhw)->model = model; | |
8cc72361 WYC |
45 | |
46 | return 0; | |
47 | } | |
48 | ||
49 | int destroy_hw_obj(struct hw *hw) | |
50 | { | |
514eef9c | 51 | int err; |
8cc72361 WYC |
52 | |
53 | switch (hw->pci->device) { | |
54 | case 0x0005: /* 20k1 device */ | |
55 | err = destroy_20k1_hw_obj(hw); | |
56 | break; | |
57 | case 0x000B: /* 20k2 device */ | |
58 | err = destroy_20k2_hw_obj(hw); | |
59 | break; | |
60 | default: | |
61 | err = -ENODEV; | |
62 | break; | |
63 | } | |
64 | ||
65 | return err; | |
66 | } | |
67 | ||
68 | unsigned int get_field(unsigned int data, unsigned int field) | |
69 | { | |
70 | int i; | |
71 | ||
29fa9578 TI |
72 | if (WARN_ON(!field)) |
73 | return 0; | |
8cc72361 WYC |
74 | /* @field should always be greater than 0 */ |
75 | for (i = 0; !(field & (1 << i)); ) | |
76 | i++; | |
77 | ||
78 | return (data & field) >> i; | |
79 | } | |
80 | ||
81 | void set_field(unsigned int *data, unsigned int field, unsigned int value) | |
82 | { | |
83 | int i; | |
84 | ||
29fa9578 TI |
85 | if (WARN_ON(!field)) |
86 | return; | |
8cc72361 WYC |
87 | /* @field should always be greater than 0 */ |
88 | for (i = 0; !(field & (1 << i)); ) | |
89 | i++; | |
90 | ||
91 | *data = (*data & (~field)) | ((value << i) & field); | |
92 | } | |
93 |