summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/lm49453.h
blob: 578a773e6fc9c12bebf5a14f69cb905a55161bc3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * lm49453.h  -  LM49453 ALSA Soc Audio drive
 *
 * Copyright (c) 2012  Texas Instruments, Inc
 */

#ifndef _LM49453_H
#define _LM49453_H

#include <linux/bitops.h>

/* LM49453_P0 register space for page0 */
#define LM49453_P0_PMC_SETUP_REG			0x00
#define LM49453_P0_PLL_CLK_SEL1_REG			0x01
#define LM49453_P0_PLL_CLK_SEL2_REG			0x02
#define LM49453_P0_PMC_CLK_DIV_REG			0x03
#define LM49453_P0_HSDET_CLK_DIV_REG			0x04
#define LM49453_P0_DMIC_CLK_DIV_REG			0x05
#define LM49453_P0_ADC_CLK_DIV_REG			0x06
#define LM49453_P0_DAC_OT_CLK_DIV_REG			0x07
#define LM49453_P0_PLL_HF_M_REG				0x08
#define LM49453_P0_PLL_LF_M_REG				0x09
#define LM49453_P0_PLL_NL_REG				0x0A
#define LM49453_P0_PLL_N_MODL_REG			0x0B
#define LM49453_P0_PLL_N_MODH_REG			0x0C
#define LM49453_P0_PLL_P1_REG				0x0D
#define LM49453_P0_PLL_P2_REG				0x0E
#define LM49453_P0_FLL_REF_FREQL_REG			0x0F
#define LM49453_P0_FLL_REF_FREQH_REG			0x10
#define LM49453_P0_VCO_TARGETLL_REG			0x11
#define LM49453_P0_VCO_TARGETLH_REG			0x12
#define LM49453_P0_VCO_TARGETHL_REG			0x13
#define LM49453_P0_VCO_TARGETHH_REG			0x14
#define LM49453_P0_PLL_CONFIG_REG			0x15
#define LM49453_P0_DAC_CLK_SEL_REG			0x16
#define LM49453_P0_DAC_HP_CLK_DIV_REG			0x17

/* Analog Mixer Input Stages */
#define LM49453_P0_MICL_REG				0x20
#define LM49453_P0_MICR_REG				0x21
#define LM49453_P0_EP_REG				0x24
#define LM49453_P0_DIS_PKVL_FB_REG			0x25

/* Analog Mixer Output Stages */
#define LM49453_P0_ANALOG_MIXER_ADC_REG			0x2E

/*ADC or DAC */
#define LM49453_P0_ADC_DSP_REG				0x30
#define LM49453_P0_DAC_DSP_REG				0x31

/* EFFECTS ENABLES */
#define LM49453_P0_ADC_FX_ENABLES_REG			0x33

/* GPIO */
#define LM49453_P0_GPIO1_REG				0x38
#define LM49453_P0_GPIO2_REG				0x39
#define LM49453_P0_GPIO3_REG				0x3A
#define LM49453_P0_HAP_CTL_REG				0x3B
#define LM49453_P0_HAP_FREQ_PROG_LEFTL_REG		0x3C
#define LM49453_P0_HAP_FREQ_PROG_LEFTH_REG		0x3D
#define LM49453_P0_HAP_FREQ_PROG_RIGHTL_REG		0x3E
#define LM49453_P0_HAP_FREQ_PROG_RIGHTH_REG		0x3F

/* DIGITAL MIXER */
#define LM49453_P0_DMIX_CLK_SEL_REG			0x40
#define LM49453_P0_PORT1_RX_LVL1_REG			0x41
#define LM49453_P0_PORT1_RX_LVL2_REG			0x42
#define LM49453_P0_PORT2_RX_LVL_REG			0x43
#define LM49453_P0_PORT1_TX1_REG			0x44
#define LM49453_P0_PORT1_TX2_REG			0x45
#define LM49453_P0_PORT1_TX3_REG			0x46
#define LM49453_P0_PORT1_TX4_REG			0x47
#define LM49453_P0_PORT1_TX5_REG			0x48
#define LM49453_P0_PORT1_TX6_REG			0x49
#define LM49453_P0_PORT1_TX7_REG			0x4A
#define LM49453_P0_PORT1_TX8_REG			0x4B
#define LM49453_P0_PORT2_TX1_REG			0x4C
#define LM49453_P0_PORT2_TX2_REG			0x4D
#define LM49453_P0_STN_SEL_REG				0x4F
#define LM49453_P0_DACHPL1_REG				0x50
#define LM49453_P0_DACHPL2_REG				0x51
#define LM49453_P0_DACHPR1_REG				0x52
#define LM49453_P0_DACHPR2_REG				0x53
#define LM49453_P0_DACLOL1_REG				0x54
#define LM49453_P0_DACLOL2_REG				0x55
#define LM49453_P0_DACLOR1_REG				0x56
#define LM49453_P0_DACLOR2_REG				0x57
#define LM49453_P0_DACLSL1_REG				0x58
#define LM49453_P0_DACLSL2_REG				0x59
#define LM49453_P0_DACLSR1_REG				0x5A
#define LM49453_P0_DACLSR2_REG				0x5B
#define LM49453_P0_DACHAL1_REG				0x5C
#define LM49453_P0_DACHAL2_REG				0x5D
#define LM49453_P0_DACHAR1_REG				0x5E
#define LM49453_P0_DACHAR2_REG				0x5F

/* AUDIO PORT 1 (TDM) */
#define LM49453_P0_AUDIO_PORT1_BASIC_REG		0x60
#define LM49453_P0_AUDIO_PORT1_CLK_GEN1_REG		0x61
#define LM49453_P0_AUDIO_PORT1_CLK_GEN2_REG		0x62
#define LM49453_P0_AUDIO_PORT1_CLK_GEN3_REG		0x63
#define LM49453_P0_AUDIO_PORT1_SYNC_RATE_REG		0x64
#define LM49453_P0_AUDIO_PORT1_SYNC_SDO_SETUP_REG	0x65
#define LM49453_P0_AUDIO_PORT1_DATA_WIDTH_REG		0x66
#define LM49453_P0_AUDIO_PORT1_RX_MSB_REG		0x67
#define LM49453_P0_AUDIO_PORT1_TX_MSB_REG		0x68
#define LM49453_P0_AUDIO_PORT1_TDM_CHANNELS_REG		0x69

/* AUDIO PORT 2 */
#define LM49453_P0_AUDIO_PORT2_BASIC_REG		0x6A
#define LM49453_P0_AUDIO_PORT2_CLK_GEN1_REG		0x6B
#define LM49453_P0_AUDIO_PORT2_CLK_GEN2_REG		0x6C
#define LM49453_P0_AUDIO_PORT2_SYNC_GEN_REG		0x6D
#define LM49453_P0_AUDIO_PORT2_DATA_WIDTH_REG		0x6E
#define LM49453_P0_AUDIO_PORT2_RX_MODE_REG		0x6F
#define LM49453_P0_AUDIO_PORT2_TX_MODE_REG		0x70

/* SAMPLE RATE */
#define LM49453_P0_PORT1_SR_LSB_REG			0x79
#define LM49453_P0_PORT1_SR_MSB_REG			0x7A
#define LM49453_P0_PORT2_SR_LSB_REG			0x7B
#define LM49453_P0_PORT2_SR_MSB_REG			0x7C

/* EFFECTS - HPFs */
#define LM49453_P0_HPF_REG				0x80

/* EFFECTS ADC ALC */
#define LM49453_P0_ADC_ALC1_REG				0x82
#define LM49453_P0_ADC_ALC2_REG				0x83
#define LM49453_P0_ADC_ALC3_REG				0x84
#define LM49453_P0_ADC_ALC4_REG				0x85
#define LM49453_P0_ADC_ALC5_REG				0x86
#define LM49453_P0_ADC_ALC6_REG				0x87
#define LM49453_P0_ADC_ALC7_REG				0x88
#define LM49453_P0_ADC_ALC8_REG				0x89
#define LM49453_P0_DMIC1_LEVELL_REG			0x8A
#define LM49453_P0_DMIC1_LEVELR_REG			0x8B
#define LM49453_P0_DMIC2_LEVELL_REG			0x8C
#define LM49453_P0_DMIC2_LEVELR_REG			0x8D
#define LM49453_P0_ADC_LEVELL_REG			0x8E
#define LM49453_P0_ADC_LEVELR_REG			0x8F
#define LM49453_P0_DAC_HP_LEVELL_REG			0x90
#define LM49453_P0_DAC_HP_LEVELR_REG			0x91
#define LM49453_P0_DAC_LO_LEVELL_REG			0x92
#define LM49453_P0_DAC_LO_LEVELR_REG			0x93
#define LM49453_P0_DAC_LS_LEVELL_REG			0x94
#define LM49453_P0_DAC_LS_LEVELR_REG			0x95
#define LM49453_P0_DAC_HA_LEVELL_REG			0x96
#define LM49453_P0_DAC_HA_LEVELR_REG			0x97
#define LM49453_P0_SOFT_MUTE_REG			0x98
#define LM49453_P0_DMIC_MUTE_CFG_REG			0x99
#define LM49453_P0_ADC_MUTE_CFG_REG			0x9A
#define LM49453_P0_DAC_MUTE_CFG_REG			0x9B

/*DIGITAL MIC1 */
#define LM49453_P0_DIGITAL_MIC1_CONFIG_REG		0xB0
#define LM49453_P0_DIGITAL_MIC1_DATA_DELAYL_REG		0xB1
#define LM49453_P0_DIGITAL_MIC1_DATA_DELAYR_REG		0xB2

/*DIGITAL MIC2 */
#define LM49453_P0_DIGITAL_MIC2_CONFIG_REG		0xB3
#define LM49453_P0_DIGITAL_MIC2_DATA_DELAYL_REG		0xB4
#define LM49453_P0_DIGITAL_MIC2_DATA_DELAYR_REG		0xB5

/* ADC DECIMATOR */
#define LM49453_P0_ADC_DECIMATOR_REG			0xB6

/* DAC CONFIGURE */
#define LM49453_P0_DAC_CONFIG_REG			0xB7

/* SIDETONE */
#define LM49453_P0_STN_VOL_ADCL_REG			0xB8
#define LM49453_P0_STN_VOL_ADCR_REG			0xB9
#define LM49453_P0_STN_VOL_DMIC1L_REG			0xBA
#define LM49453_P0_STN_VOL_DMIC1R_REG			0xBB
#define LM49453_P0_STN_VOL_DMIC2L_REG			0xBC
#define LM49453_P0_STN_VOL_DMIC2R_REG			0xBD

/* ADC/DAC CLIPPING MONITORS (Read Only/Write to Clear) */
#define LM49453_P0_ADC_DEC_CLIP_REG			0xC2
#define LM49453_P0_ADC_HPF_CLIP_REG			0xC3
#define LM49453_P0_ADC_LVL_CLIP_REG			0xC4
#define LM49453_P0_DAC_LVL_CLIP_REG			0xC5

/* ADC ALC EFFECT MONITORS (Read Only) */
#define LM49453_P0_ADC_LVLMONL_REG			0xC8
#define LM49453_P0_ADC_LVLMONR_REG			0xC9
#define LM49453_P0_ADC_ALCMONL_REG			0xCA
#define LM49453_P0_ADC_ALCMONR_REG			0xCB
#define LM49453_P0_ADC_MUTED_REG			0xCC
#define LM49453_P0_DAC_MUTED_REG			0xCD

/* HEADSET DETECT */
#define LM49453_P0_HSD_PPB_LONG_CNT_LIMITL_REG		0xD0
#define LM49453_P0_HSD_PPB_LONG_CNT_LIMITR_REG		0xD1
#define LM49453_P0_HSD_PIN3_4_EX_LOOP_CNT_LIMITL_REG	0xD2
#define LM49453_P0_HSD_PIN3_4_EX_LOOP_CNT_LIMITH_REG	0xD3
#define LM49453_P0_HSD_TIMEOUT1_REG			0xD4
#define LM49453_P0_HSD_TIMEOUT2_REG			0xD5
#define LM49453_P0_HSD_TIMEOUT3_REG			0xD6
#define LM49453_P0_HSD_PIN3_4_CFG_REG			0xD7
#define LM49453_P0_HSD_IRQ1_REG				0xD8
#define LM49453_P0_HSD_IRQ2_REG				0xD9
#define LM49453_P0_HSD_IRQ3_REG				0xDA
#define LM49453_P0_HSD_IRQ4_REG				0xDB
#define LM49453_P0_HSD_IRQ_MASK1_REG			0xDC
#define LM49453_P0_HSD_IRQ_MASK2_REG			0xDD
#define LM49453_P0_HSD_IRQ_MASK3_REG			0xDE
#define LM49453_P0_HSD_R_HPLL_REG			0xE0
#define LM49453_P0_HSD_R_HPLH_REG			0xE1
#define LM49453_P0_HSD_R_HPLU_REG			0xE2
#define LM49453_P0_HSD_R_HPRL_REG			0xE3
#define LM49453_P0_HSD_R_HPRH_REG			0xE4
#define LM49453_P0_HSD_R_HPRU_REG			0xE5
#define LM49453_P0_HSD_VEL_L_FINALL_REG			0xE6
#define LM49453_P0_HSD_VEL_L_FINALH_REG			0xE7
#define LM49453_P0_HSD_VEL_L_FINALU_REG			0xE8
#define LM49453_P0_HSD_RO_FINALL_REG			0xE9
#define LM49453_P0_HSD_RO_FINALH_REG			0xEA
#define LM49453_P0_HSD_RO_FINALU_REG			0xEB
#define LM49453_P0_HSD_VMIC_BIAS_FINALL_REG		0xEC
#define LM49453_P0_HSD_VMIC_BIAS_FINALH_REG		0xED
#define LM49453_P0_HSD_VMIC_BIAS_FINALU_REG		0xEE
#define LM49453_P0_HSD_PIN_CONFIG_REG			0xEF
#define LM49453_P0_HSD_PLUG_DETECT_BB_IRQ_STATUS1_REG	0xF1
#define LM49453_P0_HSD_PLUG_DETECT_BB_IRQ_STATUS2_REG	0xF2
#define LM49453_P0_HSD_PLUG_DETECT_BB_IRQ_STATUS3_REG	0xF3
#define LM49453_P0_HSD_PLUG_DETECT_BB_IRQ_STATEL_REG	0xF4
#define LM49453_P0_HSD_PLUG_DETECT_BB_IRQ_STATEH_REG	0xF5

/* I/O PULLDOWN CONFIG */
#define LM49453_P0_PULL_CONFIG1_REG			0xF8
#define LM49453_P0_PULL_CONFIG2_REG			0xF9
#define LM49453_P0_PULL_CONFIG3_REG			0xFA

/* RESET */
#define LM49453_P0_RESET_REG				0xFE

/* PAGE */
#define LM49453_PAGE_REG				0xFF

#define LM49453_MAX_REGISTER				(0xFF+1)

/* LM49453_P0_PMC_SETUP_REG (0x00h) */
#define LM49453_PMC_SETUP_CHIP_EN			(BIT(1)|BIT(0))
#define LM49453_PMC_SETUP_PLL_EN			BIT(2)
#define LM49453_PMC_SETUP_PLL_P2_EN			BIT(3)
#define LM49453_PMC_SETUP_PLL_FLL			BIT(4)
#define LM49453_PMC_SETUP_MCLK_OVER			BIT(5)
#define LM49453_PMC_SETUP_RTC_CLK_OVER			BIT(6)
#define LM49453_PMC_SETUP_CHIP_ACTIVE			BIT(7)

/* Chip Enable bits */
#define LM49453_CHIP_EN_SHUTDOWN			0x00
#define LM49453_CHIP_EN					0x01
#define LM49453_CHIP_EN_HSD_DETECT			0x02
#define LM49453_CHIP_EN_INVALID_HSD			0x03

/* LM49453_P0_PLL_CLK_SEL1_REG (0x01h) */
#define LM49453_CLK_SEL1_MCLK_SEL			0x11
#define LM49453_CLK_SEL1_RTC_SEL			0x11
#define LM49453_CLK_SEL1_PORT1_SEL			0x10
#define LM49453_CLK_SEL1_PORT2_SEL			0x11

/* LM49453_P0_PLL_CLK_SEL2_REG (0x02h) */
#define LM49453_CLK_SEL2_ADC_CLK_SEL			0x38

/* LM49453_P0_FLL_REF_FREQL_REG (0x0F) */
#define LM49453_FLL_REF_FREQ_VAL			0x8ca0001

/* LM49453_P0_VCO_TARGETLL_REG (0x11) */
#define LM49453_VCO_TARGET_VAL				0x8ca0001

/* LM49453_P0_ADC_DSP_REG (0x30h) */
#define LM49453_ADC_DSP_ADC_MUTEL			BIT(0)
#define LM49453_ADC_DSP_ADC_MUTER			BIT(1)
#define LM49453_ADC_DSP_DMIC1_MUTEL			BIT(2)
#define LM49453_ADC_DSP_DMIC1_MUTER			BIT(3)
#define LM49453_ADC_DSP_DMIC2_MUTEL			BIT(4)
#define LM49453_ADC_DSP_DMIC2_MUTER			BIT(5)
#define LM49453_ADC_DSP_MUTE_ALL			0x3F

/* LM49453_P0_DAC_DSP_REG (0x31h) */
#define LM49453_DAC_DSP_MUTE_ALL			0xFF

/* LM49453_P0_AUDIO_PORT1_BASIC_REG (0x60h) */
#define LM49453_AUDIO_PORT1_BASIC_FMT_MASK		(BIT(4)|BIT(3))
#define LM49453_AUDIO_PORT1_BASIC_CLK_MS		BIT(3)
#define LM49453_AUDIO_PORT1_BASIC_SYNC_MS		BIT(4)

/* LM49453_P0_RESET_REG (0xFEh) */
#define LM49453_RESET_REG_RST				BIT(0)

/* Page select register bits (0xFF) */
#define LM49453_PAGE0_SELECT				0x0
#define LM49453_PAGE1_SELECT				0x1

/* LM49453_P0_HSD_PIN3_4_CFG_REG (Jack Pin config - 0xD7) */
#define LM49453_JACK_DISABLE				0x00
#define LM49453_JACK_CONFIG1				0x01
#define LM49453_JACK_CONFIG2				0x02
#define LM49453_JACK_CONFIG3				0x03
#define LM49453_JACK_CONFIG4				0x04
#define LM49453_JACK_CONFIG5				0x05

/* Page 1 REGISTERS */

/* SIDETONE */
#define LM49453_P1_SIDETONE_SA0L_REG			0x80
#define LM49453_P1_SIDETONE_SA0H_REG			0x81
#define LM49453_P1_SIDETONE_SAB0U_REG			0x82
#define LM49453_P1_SIDETONE_SB0L_REG			0x83
#define LM49453_P1_SIDETONE_SB0H_REG			0x84
#define LM49453_P1_SIDETONE_SH0L_REG			0x85
#define LM49453_P1_SIDETONE_SH0H_REG			0x86
#define LM49453_P1_SIDETONE_SH0U_REG			0x87
#define LM49453_P1_SIDETONE_SA1L_REG			0x88
#define LM49453_P1_SIDETONE_SA1H_REG			0x89
#define LM49453_P1_SIDETONE_SAB1U_REG			0x8A
#define LM49453_P1_SIDETONE_SB1L_REG			0x8B
#define LM49453_P1_SIDETONE_SB1H_REG			0x8C
#define LM49453_P1_SIDETONE_SH1L_REG			0x8D
#define LM49453_P1_SIDETONE_SH1H_REG			0x8E
#define LM49453_P1_SIDETONE_SH1U_REG			0x8F
#define LM49453_P1_SIDETONE_SA2L_REG			0x90
#define LM49453_P1_SIDETONE_SA2H_REG			0x91
#define LM49453_P1_SIDETONE_SAB2U_REG			0x92
#define LM49453_P1_SIDETONE_SB2L_REG			0x93
#define LM49453_P1_SIDETONE_SB2H_REG			0x94
#define LM49453_P1_SIDETONE_SH2L_REG			0x95
#define LM49453_P1_SIDETONE_SH2H_REG			0x96
#define LM49453_P1_SIDETONE_SH2U_REG			0x97
#define LM49453_P1_SIDETONE_SA3L_REG			0x98
#define LM49453_P1_SIDETONE_SA3H_REG			0x99
#define LM49453_P1_SIDETONE_SAB3U_REG			0x9A
#define LM49453_P1_SIDETONE_SB3L_REG			0x9B
#define LM49453_P1_SIDETONE_SB3H_REG			0x9C
#define LM49453_P1_SIDETONE_SH3L_REG			0x9D
#define LM49453_P1_SIDETONE_SH3H_REG			0x9E
#define LM49453_P1_SIDETONE_SH3U_REG			0x9F
#define LM49453_P1_SIDETONE_SA4L_REG			0xA0
#define LM49453_P1_SIDETONE_SA4H_REG			0xA1
#define LM49453_P1_SIDETONE_SAB4U_REG			0xA2
#define LM49453_P1_SIDETONE_SB4L_REG			0xA3
#define LM49453_P1_SIDETONE_SB4H_REG			0xA4
#define LM49453_P1_SIDETONE_SH4L_REG			0xA5
#define LM49453_P1_SIDETONE_SH4H_REG			0xA6
#define LM49453_P1_SIDETONE_SH4U_REG			0xA7
#define LM49453_P1_SIDETONE_SA5L_REG			0xA8
#define LM49453_P1_SIDETONE_SA5H_REG			0xA9
#define LM49453_P1_SIDETONE_SAB5U_REG			0xAA
#define LM49453_P1_SIDETONE_SB5L_REG			0xAB
#define LM49453_P1_SIDETONE_SB5H_REG			0xAC
#define LM49453_P1_SIDETONE_SH5L_REG			0xAD
#define LM49453_P1_SIDETONE_SH5H_REG			0xAE
#define LM49453_P1_SIDETONE_SH5U_REG			0xAF

/* CHARGE PUMP CONFIG */
#define LM49453_P1_CP_CONFIG1_REG			0xB0
#define LM49453_P1_CP_CONFIG2_REG			0xB1
#define LM49453_P1_CP_CONFIG3_REG			0xB2
#define LM49453_P1_CP_CONFIG4_REG			0xB3
#define LM49453_P1_CP_LA_VTH1L_REG			0xB4
#define LM49453_P1_CP_LA_VTH1M_REG			0xB5
#define LM49453_P1_CP_LA_VTH2L_REG			0xB6
#define LM49453_P1_CP_LA_VTH2M_REG			0xB7
#define LM49453_P1_CP_LA_VTH3L_REG			0xB8
#define LM49453_P1_CP_LA_VTH3H_REG			0xB9
#define LM49453_P1_CP_CLK_DIV_REG			0xBA

/* DAC */
#define LM49453_P1_DAC_CHOP_REG				0xC0

#define	LM49453_CLK_SRC_MCLK				1
#endif
OpenPOWER on IntegriCloud