1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "audio_hw_hfp"
18/*#define LOG_NDEBUG 0*/
19#define LOG_NDDEBUG 0
20
21#include <errno.h>
22#include <math.h>
23#include <cutils/log.h>
24
25#include "audio_hw.h"
26#include "platform.h"
27#include "platform_api.h"
28#include <stdlib.h>
29#include <cutils/str_parms.h>
30
31#define AUDIO_PARAMETER_HFP_ENABLE      "hfp_enable"
32#define AUDIO_PARAMETER_HFP_SET_SAMPLING_RATE "hfp_set_sampling_rate"
33#define AUDIO_PARAMETER_KEY_HFP_VOLUME "hfp_volume"
34
35static int32_t start_hfp(struct audio_device *adev,
36                               struct str_parms *parms);
37
38static int32_t stop_hfp(struct audio_device *adev);
39
40struct hfp_module {
41    struct pcm *hfp_sco_rx;
42    struct pcm *hfp_sco_tx;
43    struct pcm *hfp_pcm_rx;
44    struct pcm *hfp_pcm_tx;
45    float  hfp_volume;
46    bool   is_hfp_running;
47    audio_usecase_t ucid;
48};
49
50static struct hfp_module hfpmod = {
51    .hfp_sco_rx = NULL,
52    .hfp_sco_tx = NULL,
53    .hfp_pcm_rx = NULL,
54    .hfp_pcm_tx = NULL,
55    .hfp_volume = 0,
56    .is_hfp_running = 0,
57    .ucid = USECASE_AUDIO_HFP_SCO,
58};
59static struct pcm_config pcm_config_hfp = {
60    .channels = 1,
61    .rate = 8000,
62    .period_size = 240,
63    .period_count = 2,
64    .format = PCM_FORMAT_S16_LE,
65    .start_threshold = 0,
66    .stop_threshold = INT_MAX,
67    .avail_min = 0,
68};
69
70static int32_t hfp_set_volume(struct audio_device *adev, float value)
71{
72    int32_t vol, ret = 0;
73    struct mixer_ctl *ctl;
74    const char *mixer_ctl_name = "Internal HFP RX Volume";
75
76    ALOGV("%s: entry", __func__);
77    ALOGD("%s: (%f)\n", __func__, value);
78
79    if (value < 0.0) {
80        ALOGW("%s: (%f) Under 0.0, assuming 0.0\n", __func__, value);
81        value = 0.0;
82    } else {
83        value = ((value > 15.000000) ? 1.0 : (value / 15));
84        ALOGW("%s: Volume brought with in range (%f)\n", __func__, value);
85    }
86    vol  = lrint((value * 0x2000) + 0.5);
87    hfpmod.hfp_volume = value;
88
89    if (!hfpmod.is_hfp_running) {
90        ALOGV("%s: HFP not active, ignoring set_hfp_volume call", __func__);
91        return -EIO;
92    }
93
94    ALOGD("%s: Setting HFP volume to %d \n", __func__, vol);
95    ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
96    if (!ctl) {
97        ALOGE("%s: Could not get ctl for mixer cmd - %s",
98              __func__, mixer_ctl_name);
99        return -EINVAL;
100    }
101    if(mixer_ctl_set_value(ctl, 0, vol) < 0) {
102        ALOGE("%s: Couldn't set HFP Volume: [%d]", __func__, vol);
103        return -EINVAL;
104    }
105
106    ALOGV("%s: exit", __func__);
107    return ret;
108}
109
110static int32_t start_hfp(struct audio_device *adev,
111                         struct str_parms *parms __unused)
112{
113    int32_t i, ret = 0;
114    struct audio_usecase *uc_info;
115    int32_t pcm_dev_rx_id, pcm_dev_tx_id, pcm_dev_asm_rx_id, pcm_dev_asm_tx_id;
116
117    ALOGD("%s: enter", __func__);
118
119    uc_info = (struct audio_usecase *)calloc(1, sizeof(struct audio_usecase));
120    uc_info->id = hfpmod.ucid;
121    uc_info->type = PCM_HFP_CALL;
122    uc_info->stream.out = adev->primary_output;
123    uc_info->devices = adev->primary_output->devices;
124    uc_info->in_snd_device = SND_DEVICE_NONE;
125    uc_info->out_snd_device = SND_DEVICE_NONE;
126
127    list_add_tail(&adev->usecase_list, &uc_info->list);
128
129    select_devices(adev, hfpmod.ucid);
130
131    pcm_dev_rx_id = platform_get_pcm_device_id(uc_info->id, PCM_PLAYBACK);
132    pcm_dev_tx_id = platform_get_pcm_device_id(uc_info->id, PCM_CAPTURE);
133    pcm_dev_asm_rx_id = HFP_ASM_RX_TX;
134    pcm_dev_asm_tx_id = HFP_ASM_RX_TX;
135    if (pcm_dev_rx_id < 0 || pcm_dev_tx_id < 0 ||
136        pcm_dev_asm_rx_id < 0 || pcm_dev_asm_tx_id < 0 ) {
137        ALOGE("%s: Invalid PCM devices (rx: %d tx: %d asm: rx tx %d) for the usecase(%d)",
138              __func__, pcm_dev_rx_id, pcm_dev_tx_id, pcm_dev_asm_rx_id, uc_info->id);
139        ret = -EIO;
140        goto exit;
141    }
142
143    ALOGV("%s: HFP PCM devices (hfp rx tx: %d pcm rx tx: %d) for the usecase(%d)",
144              __func__, pcm_dev_rx_id, pcm_dev_tx_id, uc_info->id);
145
146    ALOGV("%s: Opening PCM playback device card_id(%d) device_id(%d)",
147          __func__, adev->snd_card, pcm_dev_rx_id);
148    hfpmod.hfp_sco_rx = pcm_open(adev->snd_card,
149                                  pcm_dev_asm_rx_id,
150                                  PCM_OUT, &pcm_config_hfp);
151    if (hfpmod.hfp_sco_rx && !pcm_is_ready(hfpmod.hfp_sco_rx)) {
152        ALOGE("%s: %s", __func__, pcm_get_error(hfpmod.hfp_sco_rx));
153        ret = -EIO;
154        goto exit;
155    }
156    ALOGD("%s: Opening PCM capture device card_id(%d) device_id(%d)",
157          __func__, adev->snd_card, pcm_dev_tx_id);
158    hfpmod.hfp_pcm_rx = pcm_open(adev->snd_card,
159                                   pcm_dev_rx_id,
160                                   PCM_OUT, &pcm_config_hfp);
161    if (hfpmod.hfp_pcm_rx && !pcm_is_ready(hfpmod.hfp_pcm_rx)) {
162        ALOGE("%s: %s", __func__, pcm_get_error(hfpmod.hfp_pcm_rx));
163        ret = -EIO;
164        goto exit;
165    }
166    hfpmod.hfp_sco_tx = pcm_open(adev->snd_card,
167                                  pcm_dev_asm_tx_id,
168                                  PCM_IN, &pcm_config_hfp);
169    if (hfpmod.hfp_sco_tx && !pcm_is_ready(hfpmod.hfp_sco_tx)) {
170        ALOGE("%s: %s", __func__, pcm_get_error(hfpmod.hfp_sco_tx));
171        ret = -EIO;
172        goto exit;
173    }
174    ALOGV("%s: Opening PCM capture device card_id(%d) device_id(%d)",
175          __func__, adev->snd_card, pcm_dev_tx_id);
176    hfpmod.hfp_pcm_tx = pcm_open(adev->snd_card,
177                                   pcm_dev_tx_id,
178                                   PCM_IN, &pcm_config_hfp);
179    if (hfpmod.hfp_pcm_tx && !pcm_is_ready(hfpmod.hfp_pcm_tx)) {
180        ALOGE("%s: %s", __func__, pcm_get_error(hfpmod.hfp_pcm_tx));
181        ret = -EIO;
182        goto exit;
183    }
184    pcm_start(hfpmod.hfp_sco_rx);
185    pcm_start(hfpmod.hfp_sco_tx);
186    pcm_start(hfpmod.hfp_pcm_rx);
187    pcm_start(hfpmod.hfp_pcm_tx);
188
189    hfpmod.is_hfp_running = true;
190    hfp_set_volume(adev, hfpmod.hfp_volume);
191
192    ALOGD("%s: exit: status(%d)", __func__, ret);
193    return 0;
194
195exit:
196    stop_hfp(adev);
197    ALOGE("%s: Problem in HFP start: status(%d)", __func__, ret);
198    return ret;
199}
200
201static int32_t stop_hfp(struct audio_device *adev)
202{
203    int32_t i, ret = 0;
204    struct audio_usecase *uc_info;
205
206    ALOGD("%s: enter", __func__);
207    hfpmod.is_hfp_running = false;
208
209    /* 1. Close the PCM devices */
210    if (hfpmod.hfp_sco_rx) {
211        pcm_close(hfpmod.hfp_sco_rx);
212        hfpmod.hfp_sco_rx = NULL;
213    }
214    if (hfpmod.hfp_sco_tx) {
215        pcm_close(hfpmod.hfp_sco_tx);
216        hfpmod.hfp_sco_tx = NULL;
217    }
218    if (hfpmod.hfp_pcm_rx) {
219        pcm_close(hfpmod.hfp_pcm_rx);
220        hfpmod.hfp_pcm_rx = NULL;
221    }
222    if (hfpmod.hfp_pcm_tx) {
223        pcm_close(hfpmod.hfp_pcm_tx);
224        hfpmod.hfp_pcm_tx = NULL;
225    }
226
227    uc_info = get_usecase_from_list(adev, hfpmod.ucid);
228    if (uc_info == NULL) {
229        ALOGE("%s: Could not find the usecase (%d) in the list",
230              __func__, hfpmod.ucid);
231        return -EINVAL;
232    }
233
234    /* 2. Get and set stream specific mixer controls */
235    disable_audio_route(adev, uc_info);
236
237    /* 3. Disable the rx and tx devices */
238    disable_snd_device(adev, uc_info->out_snd_device);
239    disable_snd_device(adev, uc_info->in_snd_device);
240
241    list_remove(&uc_info->list);
242    free(uc_info);
243
244    ALOGD("%s: exit: status(%d)", __func__, ret);
245    return ret;
246}
247
248bool audio_extn_hfp_is_active(struct audio_device *adev)
249{
250    struct audio_usecase *hfp_usecase = NULL;
251    hfp_usecase = get_usecase_from_list(adev, hfpmod.ucid);
252
253    if (hfp_usecase != NULL)
254        return true;
255    else
256        return false;
257}
258
259audio_usecase_t audio_extn_hfp_get_usecase()
260{
261    return hfpmod.ucid;
262}
263
264void audio_extn_hfp_set_parameters(struct audio_device *adev, struct str_parms *parms)
265{
266    int ret;
267    int rate;
268    int val;
269    float vol;
270    char value[32]={0};
271
272    ret = str_parms_get_str(parms, AUDIO_PARAMETER_HFP_ENABLE, value,
273                            sizeof(value));
274    if (ret >= 0) {
275           if (!strncmp(value,"true",sizeof(value)))
276               ret = start_hfp(adev,parms);
277           else
278               stop_hfp(adev);
279    }
280    memset(value, 0, sizeof(value));
281    ret = str_parms_get_str(parms,AUDIO_PARAMETER_HFP_SET_SAMPLING_RATE, value,
282                            sizeof(value));
283    if (ret >= 0) {
284           rate = atoi(value);
285           if (rate == 8000){
286               hfpmod.ucid = USECASE_AUDIO_HFP_SCO;
287               pcm_config_hfp.rate = rate;
288           } else if (rate == 16000){
289               hfpmod.ucid = USECASE_AUDIO_HFP_SCO_WB;
290               pcm_config_hfp.rate = rate;
291           } else
292               ALOGE("Unsupported rate..");
293    }
294
295    if (hfpmod.is_hfp_running) {
296        memset(value, 0, sizeof(value));
297        ret = str_parms_get_str(parms, AUDIO_PARAMETER_STREAM_ROUTING,
298                                value, sizeof(value));
299        if (ret >= 0) {
300            val = atoi(value);
301            if (val > 0)
302                select_devices(adev, hfpmod.ucid);
303        }
304    }
305
306    memset(value, 0, sizeof(value));
307    ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_HFP_VOLUME,
308                            value, sizeof(value));
309    if (ret >= 0) {
310        if (sscanf(value, "%f", &vol) != 1){
311            ALOGE("%s: error in retrieving hfp volume", __func__);
312            ret = -EIO;
313            goto exit;
314        }
315        ALOGD("%s: set_hfp_volume usecase, Vol: [%f]", __func__, vol);
316        hfp_set_volume(adev, vol);
317    }
318exit:
319    ALOGV("%s Exit",__func__);
320}
321