1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * UAC3 Power Domain state management functi
4 */
5
6 #include <linux/slab.h>
7 #include <linux/usb.h>
8 #include <linux/usb/audio.h>
9 #include <linux/usb/audio-v2.h>
10 #include <linux/usb/audio-v3.h>
11
12 #include "usbaudio.h"
13 #include "helper.h"
14 #include "power.h"
15
16 struct snd_usb_power_domain *
17 snd_usb_find_power_domain(struct usb_host_inte
18 unsigned char id)
19 {
20 struct snd_usb_power_domain *pd;
21 void *p;
22
23 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
24 if (!pd)
25 return NULL;
26
27 p = NULL;
28 while ((p = snd_usb_find_csint_desc(ct
29 ct
30 p,
31 struct uac3_power_domain_descr
32 int i;
33
34 if (!snd_usb_validate_audio_de
35 continue;
36 for (i = 0; i < pd_desc->bNrEn
37 if (pd_desc->baEntityI
38 pd->pd_id = pd
39 pd->pd_d1d0_re
40 le16_t
41 pd->pd_d2d0_re
42 le16_t
43 pd->ctrl_iface
44 return pd;
45 }
46 }
47 }
48
49 kfree(pd);
50 return NULL;
51 }
52
53 int snd_usb_power_domain_set(struct snd_usb_au
54 struct snd_usb_po
55 unsigned char sta
56 {
57 struct usb_device *dev = chip->dev;
58 unsigned char current_state;
59 int err, idx;
60
61 idx = snd_usb_ctrl_intf(pd->ctrl_iface
62
63 err = snd_usb_ctl_msg(chip->dev, usb_r
64 UAC2_CS_CUR,
65 USB_RECIP_INTERF
66 UAC3_AC_POWER_DO
67 ¤t_state,
68 if (err < 0) {
69 dev_err(&dev->dev, "Can't get
70 pd->pd_id);
71 return err;
72 }
73
74 if (current_state == state) {
75 dev_dbg(&dev->dev, "UAC3 power
76 pd->pd_id, state);
77 return 0;
78 }
79
80 err = snd_usb_ctl_msg(chip->dev, usb_s
81 USB_RECIP_INTERF
82 UAC3_AC_POWER_DO
83 &state, sizeof(s
84 if (err < 0) {
85 dev_err(&dev->dev, "Can't set
86 state, pd->pd_id);
87 return err;
88 }
89
90 if (state == UAC3_PD_STATE_D0) {
91 switch (current_state) {
92 case UAC3_PD_STATE_D2:
93 udelay(pd->pd_d2d0_rec
94 break;
95 case UAC3_PD_STATE_D1:
96 udelay(pd->pd_d1d0_rec
97 break;
98 default:
99 return -EINVAL;
100 }
101 }
102
103 dev_dbg(&dev->dev, "UAC3 power domain
104 pd->pd_id, state);
105
106 return 0;
107 }
108
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