1 // SPDX-License-Identifier: GPL-2.0+
3  * audio.c -- Audio gadget driver
13 #include <linux/usb/composite.h>
15 #define DRIVER_DESC		"Linux USB Audio Gadget"
23 /* Playback(USB-IN) Default Stereo - Fl/Fr */
39 /* Playback bInterval for HS/SS (1-4: fixed, 0: auto) */
43 		"Playback bInterval for HS/SS (1-4: fixed, 0: auto)");
45 /* Capture(USB-OUT) Default Stereo - Fl/Fr */
61 /* capture bInterval for HS/SS (1-4: fixed, 0: auto) */
65 		"Capture bInterval for HS/SS (1-4: fixed, 0: auto)");
71 /* Playback(USB-IN) Default Stereo - Fl/Fr */
87 /* Capture(USB-OUT) Default Stereo - Fl/Fr */
141 	.language = 0x0409,	/* en-us */
158 /*-------------------------------------------------------------------------*/
160 /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
161  * Instead:  allocate your own, using normal USB-IF procedures.
166 #define AUDIO_PRODUCT_NUM		0x0101	/* Linux-USB Audio Gadget */
168 /*-------------------------------------------------------------------------*/
202 /*-------------------------------------------------------------------------*/
208 	/* FIXME alloc iConfiguration string, set it in c->strings */  in audio_do_config()
210 	if (gadget_is_otg(c->cdev->gadget)) {  in audio_do_config()
211 		c->descriptors = otg_desc;  in audio_do_config()
212 		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;  in audio_do_config()
217 	if (IS_ERR(f_uac1)) {  in audio_do_config()
223 	if (status < 0) {  in audio_do_config()
229 	if (IS_ERR(f_uac2)) {  in audio_do_config()
235 	if (status < 0) {  in audio_do_config()
251 /*-------------------------------------------------------------------------*/
270 	if (IS_ERR(fi_uac2))  in audio_bind()
278 	if (IS_ERR(fi_uac1))  in audio_bind()
284 	uac2_opts->p_chmask = p_chmask;  in audio_bind()
287 		uac2_opts->p_srates[i] = p_srates[i];  in audio_bind()
289 	uac2_opts->p_ssize = p_ssize;  in audio_bind()
290 	uac2_opts->p_hs_bint = p_hs_bint;  in audio_bind()
291 	uac2_opts->c_chmask = c_chmask;  in audio_bind()
294 		uac2_opts->c_srates[i] = c_srates[i];  in audio_bind()
296 	uac2_opts->c_ssize = c_ssize;  in audio_bind()
297 	uac2_opts->c_hs_bint = c_hs_bint;  in audio_bind()
298 	uac2_opts->req_number = UAC2_DEF_REQ_NUM;  in audio_bind()
302 	uac1_opts->p_chmask = p_chmask;  in audio_bind()
305 		uac1_opts->p_srates[i] = p_srates[i];  in audio_bind()
307 	uac1_opts->p_ssize = p_ssize;  in audio_bind()
308 	uac1_opts->c_chmask = c_chmask;  in audio_bind()
311 		uac1_opts->c_srates[i] = c_srates[i];  in audio_bind()
313 	uac1_opts->c_ssize = c_ssize;  in audio_bind()
314 	uac1_opts->req_number = UAC1_DEF_REQ_NUM;  in audio_bind()
317 	uac1_opts->fn_play = fn_play;  in audio_bind()
318 	uac1_opts->fn_cap = fn_cap;  in audio_bind()
319 	uac1_opts->fn_cntl = fn_cntl;  in audio_bind()
320 	uac1_opts->req_buf_size = req_buf_size;  in audio_bind()
321 	uac1_opts->req_count = req_count;  in audio_bind()
322 	uac1_opts->audio_buf_size = audio_buf_size;  in audio_bind()
327 	if (status < 0)  in audio_bind()
332 	if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) {  in audio_bind()
335 		usb_desc = usb_otg_descriptor_alloc(cdev->gadget);  in audio_bind()
336 		if (!usb_desc) {  in audio_bind()
337 			status = -ENOMEM;  in audio_bind()
340 		usb_otg_descriptor_init(cdev->gadget, usb_desc);  in audio_bind()
346 	if (status < 0)  in audio_bind()
368 	if (!IS_ERR_OR_NULL(f_uac1))  in audio_unbind()
370 	if (!IS_ERR_OR_NULL(fi_uac1))  in audio_unbind()
373 	if (!IS_ERR_OR_NULL(f_uac2))  in audio_unbind()
375 	if (!IS_ERR_OR_NULL(fi_uac2))  in audio_unbind()