Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / sound / pci / ctxfi / cthardware.c
bloba689f255270641ab21f17474e8dbfe8ced37ae19
1 /**
2 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
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.
8 * @File cthardware.c
10 * @Brief
11 * This file contains the implementation of hardware access methord.
13 * @Author Liu Chun
14 * @Date Jun 26 2008
18 #include "cthardware.h"
19 #include "cthw20k1.h"
20 #include "cthw20k2.h"
21 #include <linux/bug.h>
23 int create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type,
24 enum CTCARDS model, struct hw **rhw)
26 int err;
28 switch (chip_type) {
29 case ATC20K1:
30 err = create_20k1_hw_obj(rhw);
31 break;
32 case ATC20K2:
33 err = create_20k2_hw_obj(rhw);
34 break;
35 default:
36 err = -ENODEV;
37 break;
39 if (err)
40 return err;
42 (*rhw)->pci = pci;
43 (*rhw)->chip_type = chip_type;
44 (*rhw)->model = model;
46 return 0;
49 int destroy_hw_obj(struct hw *hw)
51 int err;
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;
65 return err;
68 unsigned int get_field(unsigned int data, unsigned int field)
70 int i;
72 if (WARN_ON(!field))
73 return 0;
74 /* @field should always be greater than 0 */
75 for (i = 0; !(field & (1 << i)); )
76 i++;
78 return (data & field) >> i;
81 void set_field(unsigned int *data, unsigned int field, unsigned int value)
83 int i;
85 if (WARN_ON(!field))
86 return;
87 /* @field should always be greater than 0 */
88 for (i = 0; !(field & (1 << i)); )
89 i++;
91 *data = (*data & (~field)) | ((value << i) & field);