Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * f_audio.c -- USB Audio class function driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> |
| 5 | * Copyright (C) 2008 Analog Devices, Inc |
| 6 | * |
| 7 | * Enter bugs at http://blackfin.uclinux.org/ |
| 8 | * |
| 9 | * Licensed under the GPL-2 or later. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/device.h> |
| 14 | #include <asm/atomic.h> |
| 15 | |
| 16 | #include "u_audio.h" |
| 17 | |
| 18 | #define OUT_EP_MAX_PACKET_SIZE 200 |
| 19 | static int req_buf_size = OUT_EP_MAX_PACKET_SIZE; |
| 20 | module_param(req_buf_size, int, S_IRUGO); |
| 21 | MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size"); |
| 22 | |
| 23 | static int req_count = 256; |
| 24 | module_param(req_count, int, S_IRUGO); |
| 25 | MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count"); |
| 26 | |
| 27 | static int audio_buf_size = 48000; |
| 28 | module_param(audio_buf_size, int, S_IRUGO); |
| 29 | MODULE_PARM_DESC(audio_buf_size, "Audio buffer size"); |
| 30 | |
Laurent Pinchart | b95cd7e | 2009-06-21 23:21:55 +0200 | [diff] [blame] | 31 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value); |
| 32 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd); |
| 33 | |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 34 | /* |
| 35 | * DESCRIPTORS ... most are static, but strings and full |
| 36 | * configuration descriptors are built on demand. |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * We have two interfaces- AudioControl and AudioStreaming |
| 41 | * TODO: only supcard playback currently |
| 42 | */ |
| 43 | #define F_AUDIO_AC_INTERFACE 0 |
| 44 | #define F_AUDIO_AS_INTERFACE 1 |
| 45 | #define F_AUDIO_NUM_INTERFACES 2 |
| 46 | |
| 47 | /* B.3.1 Standard AC Interface Descriptor */ |
| 48 | static struct usb_interface_descriptor ac_interface_desc __initdata = { |
| 49 | .bLength = USB_DT_INTERFACE_SIZE, |
| 50 | .bDescriptorType = USB_DT_INTERFACE, |
| 51 | .bNumEndpoints = 0, |
| 52 | .bInterfaceClass = USB_CLASS_AUDIO, |
| 53 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, |
| 54 | }; |
| 55 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 56 | DECLARE_UAC_AC_HEADER_DESCRIPTOR(2); |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 57 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 58 | #define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) |
Cliff Cai | d16f172 | 2009-12-09 22:21:12 -0500 | [diff] [blame^] | 59 | /* 1 input terminal, 1 output terminal and 1 feature unit */ |
| 60 | #define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \ |
| 61 | + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0)) |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 62 | /* B.3.2 Class-Specific AC Interface Descriptor */ |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 63 | static struct uac_ac_header_descriptor_2 ac_header_desc = { |
| 64 | .bLength = UAC_DT_AC_HEADER_LENGTH, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 65 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 66 | .bDescriptorSubtype = UAC_HEADER, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 67 | .bcdADC = __constant_cpu_to_le16(0x0100), |
Cliff Cai | d16f172 | 2009-12-09 22:21:12 -0500 | [diff] [blame^] | 68 | .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH), |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 69 | .bInCollection = F_AUDIO_NUM_INTERFACES, |
| 70 | .baInterfaceNr = { |
| 71 | [0] = F_AUDIO_AC_INTERFACE, |
| 72 | [1] = F_AUDIO_AS_INTERFACE, |
| 73 | } |
| 74 | }; |
| 75 | |
| 76 | #define INPUT_TERMINAL_ID 1 |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 77 | static struct uac_input_terminal_descriptor input_terminal_desc = { |
| 78 | .bLength = UAC_DT_INPUT_TERMINAL_SIZE, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 79 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 80 | .bDescriptorSubtype = UAC_INPUT_TERMINAL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 81 | .bTerminalID = INPUT_TERMINAL_ID, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 82 | .wTerminalType = UAC_TERMINAL_STREAMING, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 83 | .bAssocTerminal = 0, |
| 84 | .wChannelConfig = 0x3, |
| 85 | }; |
| 86 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 87 | DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0); |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 88 | |
| 89 | #define FEATURE_UNIT_ID 2 |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 90 | static struct uac_feature_unit_descriptor_0 feature_unit_desc = { |
| 91 | .bLength = UAC_DT_FEATURE_UNIT_SIZE(0), |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 92 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 93 | .bDescriptorSubtype = UAC_FEATURE_UNIT, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 94 | .bUnitID = FEATURE_UNIT_ID, |
| 95 | .bSourceID = INPUT_TERMINAL_ID, |
| 96 | .bControlSize = 2, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 97 | .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME), |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 98 | }; |
| 99 | |
| 100 | static struct usb_audio_control mute_control = { |
| 101 | .list = LIST_HEAD_INIT(mute_control.list), |
| 102 | .name = "Mute Control", |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 103 | .type = UAC_MUTE_CONTROL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 104 | /* Todo: add real Mute control code */ |
| 105 | .set = generic_set_cmd, |
| 106 | .get = generic_get_cmd, |
| 107 | }; |
| 108 | |
| 109 | static struct usb_audio_control volume_control = { |
| 110 | .list = LIST_HEAD_INIT(volume_control.list), |
| 111 | .name = "Volume Control", |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 112 | .type = UAC_VOLUME_CONTROL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 113 | /* Todo: add real Volume control code */ |
| 114 | .set = generic_set_cmd, |
| 115 | .get = generic_get_cmd, |
| 116 | }; |
| 117 | |
| 118 | static struct usb_audio_control_selector feature_unit = { |
| 119 | .list = LIST_HEAD_INIT(feature_unit.list), |
| 120 | .id = FEATURE_UNIT_ID, |
| 121 | .name = "Mute & Volume Control", |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 122 | .type = UAC_FEATURE_UNIT, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 123 | .desc = (struct usb_descriptor_header *)&feature_unit_desc, |
| 124 | }; |
| 125 | |
| 126 | #define OUTPUT_TERMINAL_ID 3 |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 127 | static struct uac_output_terminal_descriptor output_terminal_desc = { |
| 128 | .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 129 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 130 | .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 131 | .bTerminalID = OUTPUT_TERMINAL_ID, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 132 | .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 133 | .bAssocTerminal = FEATURE_UNIT_ID, |
| 134 | .bSourceID = FEATURE_UNIT_ID, |
| 135 | }; |
| 136 | |
| 137 | /* B.4.1 Standard AS Interface Descriptor */ |
| 138 | static struct usb_interface_descriptor as_interface_alt_0_desc = { |
| 139 | .bLength = USB_DT_INTERFACE_SIZE, |
| 140 | .bDescriptorType = USB_DT_INTERFACE, |
| 141 | .bAlternateSetting = 0, |
| 142 | .bNumEndpoints = 0, |
| 143 | .bInterfaceClass = USB_CLASS_AUDIO, |
| 144 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
| 145 | }; |
| 146 | |
| 147 | static struct usb_interface_descriptor as_interface_alt_1_desc = { |
| 148 | .bLength = USB_DT_INTERFACE_SIZE, |
| 149 | .bDescriptorType = USB_DT_INTERFACE, |
| 150 | .bAlternateSetting = 1, |
| 151 | .bNumEndpoints = 1, |
| 152 | .bInterfaceClass = USB_CLASS_AUDIO, |
| 153 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
| 154 | }; |
| 155 | |
| 156 | /* B.4.2 Class-Specific AS Interface Descriptor */ |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 157 | static struct uac_as_header_descriptor as_header_desc = { |
| 158 | .bLength = UAC_DT_AS_HEADER_SIZE, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 159 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 160 | .bDescriptorSubtype = UAC_AS_GENERAL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 161 | .bTerminalLink = INPUT_TERMINAL_ID, |
| 162 | .bDelay = 1, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 163 | .wFormatTag = UAC_FORMAT_TYPE_I_PCM, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 164 | }; |
| 165 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 166 | DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 167 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 168 | static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = { |
| 169 | .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 170 | .bDescriptorType = USB_DT_CS_INTERFACE, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 171 | .bDescriptorSubtype = UAC_FORMAT_TYPE, |
| 172 | .bFormatType = UAC_FORMAT_TYPE_I, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 173 | .bSubframeSize = 2, |
| 174 | .bBitResolution = 16, |
| 175 | .bSamFreqType = 1, |
| 176 | }; |
| 177 | |
| 178 | /* Standard ISO OUT Endpoint Descriptor */ |
| 179 | static struct usb_endpoint_descriptor as_out_ep_desc __initdata = { |
| 180 | .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, |
| 181 | .bDescriptorType = USB_DT_ENDPOINT, |
| 182 | .bEndpointAddress = USB_DIR_OUT, |
Laurent Pinchart | 85e08ca | 2009-06-21 23:19:23 +0200 | [diff] [blame] | 183 | .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 184 | | USB_ENDPOINT_XFER_ISOC, |
| 185 | .wMaxPacketSize = __constant_cpu_to_le16(OUT_EP_MAX_PACKET_SIZE), |
| 186 | .bInterval = 4, |
| 187 | }; |
| 188 | |
| 189 | /* Class-specific AS ISO OUT Endpoint Descriptor */ |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 190 | static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = { |
| 191 | .bLength = UAC_ISO_ENDPOINT_DESC_SIZE, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 192 | .bDescriptorType = USB_DT_CS_ENDPOINT, |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 193 | .bDescriptorSubtype = UAC_EP_GENERAL, |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 194 | .bmAttributes = 1, |
| 195 | .bLockDelayUnits = 1, |
| 196 | .wLockDelay = __constant_cpu_to_le16(1), |
| 197 | }; |
| 198 | |
| 199 | static struct usb_descriptor_header *f_audio_desc[] __initdata = { |
| 200 | (struct usb_descriptor_header *)&ac_interface_desc, |
| 201 | (struct usb_descriptor_header *)&ac_header_desc, |
| 202 | |
| 203 | (struct usb_descriptor_header *)&input_terminal_desc, |
| 204 | (struct usb_descriptor_header *)&output_terminal_desc, |
| 205 | (struct usb_descriptor_header *)&feature_unit_desc, |
| 206 | |
| 207 | (struct usb_descriptor_header *)&as_interface_alt_0_desc, |
| 208 | (struct usb_descriptor_header *)&as_interface_alt_1_desc, |
| 209 | (struct usb_descriptor_header *)&as_header_desc, |
| 210 | |
| 211 | (struct usb_descriptor_header *)&as_type_i_desc, |
| 212 | |
| 213 | (struct usb_descriptor_header *)&as_out_ep_desc, |
| 214 | (struct usb_descriptor_header *)&as_iso_out_desc, |
| 215 | NULL, |
| 216 | }; |
| 217 | |
| 218 | /* string IDs are assigned dynamically */ |
| 219 | |
| 220 | #define STRING_MANUFACTURER_IDX 0 |
| 221 | #define STRING_PRODUCT_IDX 1 |
| 222 | |
| 223 | static char manufacturer[50]; |
| 224 | |
| 225 | static struct usb_string strings_dev[] = { |
| 226 | [STRING_MANUFACTURER_IDX].s = manufacturer, |
| 227 | [STRING_PRODUCT_IDX].s = DRIVER_DESC, |
| 228 | { } /* end of list */ |
| 229 | }; |
| 230 | |
| 231 | static struct usb_gadget_strings stringtab_dev = { |
| 232 | .language = 0x0409, /* en-us */ |
| 233 | .strings = strings_dev, |
| 234 | }; |
| 235 | |
| 236 | static struct usb_gadget_strings *audio_strings[] = { |
| 237 | &stringtab_dev, |
| 238 | NULL, |
| 239 | }; |
| 240 | |
| 241 | /* |
| 242 | * This function is an ALSA sound card following USB Audio Class Spec 1.0. |
| 243 | */ |
| 244 | |
| 245 | /*-------------------------------------------------------------------------*/ |
| 246 | struct f_audio_buf { |
| 247 | u8 *buf; |
| 248 | int actual; |
| 249 | struct list_head list; |
| 250 | }; |
| 251 | |
| 252 | static struct f_audio_buf *f_audio_buffer_alloc(int buf_size) |
| 253 | { |
| 254 | struct f_audio_buf *copy_buf; |
| 255 | |
| 256 | copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC); |
| 257 | if (!copy_buf) |
Julia Lawall | ff3b968 | 2009-12-09 14:23:32 +0100 | [diff] [blame] | 258 | return ERR_PTR(-ENOMEM); |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 259 | |
| 260 | copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); |
| 261 | if (!copy_buf->buf) { |
| 262 | kfree(copy_buf); |
Julia Lawall | ff3b968 | 2009-12-09 14:23:32 +0100 | [diff] [blame] | 263 | return ERR_PTR(-ENOMEM); |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | return copy_buf; |
| 267 | } |
| 268 | |
| 269 | static void f_audio_buffer_free(struct f_audio_buf *audio_buf) |
| 270 | { |
| 271 | kfree(audio_buf->buf); |
| 272 | kfree(audio_buf); |
| 273 | } |
| 274 | /*-------------------------------------------------------------------------*/ |
| 275 | |
| 276 | struct f_audio { |
| 277 | struct gaudio card; |
| 278 | |
| 279 | /* endpoints handle full and/or high speeds */ |
| 280 | struct usb_ep *out_ep; |
| 281 | struct usb_endpoint_descriptor *out_desc; |
| 282 | |
| 283 | spinlock_t lock; |
| 284 | struct f_audio_buf *copy_buf; |
| 285 | struct work_struct playback_work; |
| 286 | struct list_head play_queue; |
| 287 | |
| 288 | /* Control Set command */ |
| 289 | struct list_head cs; |
| 290 | u8 set_cmd; |
| 291 | struct usb_audio_control *set_con; |
| 292 | }; |
| 293 | |
| 294 | static inline struct f_audio *func_to_audio(struct usb_function *f) |
| 295 | { |
| 296 | return container_of(f, struct f_audio, card.func); |
| 297 | } |
| 298 | |
| 299 | /*-------------------------------------------------------------------------*/ |
| 300 | |
| 301 | static void f_audio_playback_work(struct work_struct *data) |
| 302 | { |
| 303 | struct f_audio *audio = container_of(data, struct f_audio, |
| 304 | playback_work); |
| 305 | struct f_audio_buf *play_buf; |
| 306 | |
| 307 | spin_lock_irq(&audio->lock); |
| 308 | if (list_empty(&audio->play_queue)) { |
| 309 | spin_unlock_irq(&audio->lock); |
| 310 | return; |
| 311 | } |
| 312 | play_buf = list_first_entry(&audio->play_queue, |
| 313 | struct f_audio_buf, list); |
| 314 | list_del(&play_buf->list); |
| 315 | spin_unlock_irq(&audio->lock); |
| 316 | |
| 317 | u_audio_playback(&audio->card, play_buf->buf, play_buf->actual); |
| 318 | f_audio_buffer_free(play_buf); |
| 319 | |
| 320 | return; |
| 321 | } |
| 322 | |
| 323 | static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) |
| 324 | { |
| 325 | struct f_audio *audio = req->context; |
| 326 | struct usb_composite_dev *cdev = audio->card.func.config->cdev; |
| 327 | struct f_audio_buf *copy_buf = audio->copy_buf; |
| 328 | int err; |
| 329 | |
| 330 | if (!copy_buf) |
| 331 | return -EINVAL; |
| 332 | |
| 333 | /* Copy buffer is full, add it to the play_queue */ |
| 334 | if (audio_buf_size - copy_buf->actual < req->actual) { |
| 335 | list_add_tail(©_buf->list, &audio->play_queue); |
| 336 | schedule_work(&audio->playback_work); |
| 337 | copy_buf = f_audio_buffer_alloc(audio_buf_size); |
Julia Lawall | ff3b968 | 2009-12-09 14:23:32 +0100 | [diff] [blame] | 338 | if (IS_ERR(copy_buf)) |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 339 | return -ENOMEM; |
| 340 | } |
| 341 | |
| 342 | memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual); |
| 343 | copy_buf->actual += req->actual; |
| 344 | audio->copy_buf = copy_buf; |
| 345 | |
| 346 | err = usb_ep_queue(ep, req, GFP_ATOMIC); |
| 347 | if (err) |
| 348 | ERROR(cdev, "%s queue req: %d\n", ep->name, err); |
| 349 | |
| 350 | return 0; |
| 351 | |
| 352 | } |
| 353 | |
| 354 | static void f_audio_complete(struct usb_ep *ep, struct usb_request *req) |
| 355 | { |
| 356 | struct f_audio *audio = req->context; |
| 357 | int status = req->status; |
| 358 | u32 data = 0; |
| 359 | struct usb_ep *out_ep = audio->out_ep; |
| 360 | |
| 361 | switch (status) { |
| 362 | |
| 363 | case 0: /* normal completion? */ |
| 364 | if (ep == out_ep) |
| 365 | f_audio_out_ep_complete(ep, req); |
| 366 | else if (audio->set_con) { |
| 367 | memcpy(&data, req->buf, req->length); |
| 368 | audio->set_con->set(audio->set_con, audio->set_cmd, |
| 369 | le16_to_cpu(data)); |
| 370 | audio->set_con = NULL; |
| 371 | } |
| 372 | break; |
| 373 | default: |
| 374 | break; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | static int audio_set_intf_req(struct usb_function *f, |
| 379 | const struct usb_ctrlrequest *ctrl) |
| 380 | { |
| 381 | struct f_audio *audio = func_to_audio(f); |
| 382 | struct usb_composite_dev *cdev = f->config->cdev; |
| 383 | struct usb_request *req = cdev->req; |
| 384 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
| 385 | u16 len = le16_to_cpu(ctrl->wLength); |
| 386 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 387 | u8 con_sel = (w_value >> 8) & 0xFF; |
| 388 | u8 cmd = (ctrl->bRequest & 0x0F); |
| 389 | struct usb_audio_control_selector *cs; |
| 390 | struct usb_audio_control *con; |
| 391 | |
| 392 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", |
| 393 | ctrl->bRequest, w_value, len, id); |
| 394 | |
| 395 | list_for_each_entry(cs, &audio->cs, list) { |
| 396 | if (cs->id == id) { |
| 397 | list_for_each_entry(con, &cs->control, list) { |
| 398 | if (con->type == con_sel) { |
| 399 | audio->set_con = con; |
| 400 | break; |
| 401 | } |
| 402 | } |
| 403 | break; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | audio->set_cmd = cmd; |
| 408 | req->context = audio; |
| 409 | req->complete = f_audio_complete; |
| 410 | |
| 411 | return len; |
| 412 | } |
| 413 | |
| 414 | static int audio_get_intf_req(struct usb_function *f, |
| 415 | const struct usb_ctrlrequest *ctrl) |
| 416 | { |
| 417 | struct f_audio *audio = func_to_audio(f); |
| 418 | struct usb_composite_dev *cdev = f->config->cdev; |
| 419 | struct usb_request *req = cdev->req; |
| 420 | int value = -EOPNOTSUPP; |
| 421 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
| 422 | u16 len = le16_to_cpu(ctrl->wLength); |
| 423 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 424 | u8 con_sel = (w_value >> 8) & 0xFF; |
| 425 | u8 cmd = (ctrl->bRequest & 0x0F); |
| 426 | struct usb_audio_control_selector *cs; |
| 427 | struct usb_audio_control *con; |
| 428 | |
| 429 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", |
| 430 | ctrl->bRequest, w_value, len, id); |
| 431 | |
| 432 | list_for_each_entry(cs, &audio->cs, list) { |
| 433 | if (cs->id == id) { |
| 434 | list_for_each_entry(con, &cs->control, list) { |
| 435 | if (con->type == con_sel && con->get) { |
| 436 | value = con->get(con, cmd); |
| 437 | break; |
| 438 | } |
| 439 | } |
| 440 | break; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | req->context = audio; |
| 445 | req->complete = f_audio_complete; |
| 446 | memcpy(req->buf, &value, len); |
| 447 | |
| 448 | return len; |
| 449 | } |
| 450 | |
Laurent Pinchart | 0ad7252 | 2009-10-21 00:03:39 +0200 | [diff] [blame] | 451 | static int audio_set_endpoint_req(struct usb_function *f, |
| 452 | const struct usb_ctrlrequest *ctrl) |
| 453 | { |
| 454 | struct usb_composite_dev *cdev = f->config->cdev; |
| 455 | int value = -EOPNOTSUPP; |
| 456 | u16 ep = le16_to_cpu(ctrl->wIndex); |
| 457 | u16 len = le16_to_cpu(ctrl->wLength); |
| 458 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 459 | |
| 460 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", |
| 461 | ctrl->bRequest, w_value, len, ep); |
| 462 | |
| 463 | switch (ctrl->bRequest) { |
| 464 | case UAC_SET_CUR: |
| 465 | value = 0; |
| 466 | break; |
| 467 | |
| 468 | case UAC_SET_MIN: |
| 469 | break; |
| 470 | |
| 471 | case UAC_SET_MAX: |
| 472 | break; |
| 473 | |
| 474 | case UAC_SET_RES: |
| 475 | break; |
| 476 | |
| 477 | case UAC_SET_MEM: |
| 478 | break; |
| 479 | |
| 480 | default: |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | return value; |
| 485 | } |
| 486 | |
| 487 | static int audio_get_endpoint_req(struct usb_function *f, |
| 488 | const struct usb_ctrlrequest *ctrl) |
| 489 | { |
| 490 | struct usb_composite_dev *cdev = f->config->cdev; |
| 491 | int value = -EOPNOTSUPP; |
| 492 | u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
| 493 | u16 len = le16_to_cpu(ctrl->wLength); |
| 494 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 495 | |
| 496 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", |
| 497 | ctrl->bRequest, w_value, len, ep); |
| 498 | |
| 499 | switch (ctrl->bRequest) { |
| 500 | case UAC_GET_CUR: |
| 501 | case UAC_GET_MIN: |
| 502 | case UAC_GET_MAX: |
| 503 | case UAC_GET_RES: |
| 504 | value = 3; |
| 505 | break; |
| 506 | case UAC_GET_MEM: |
| 507 | break; |
| 508 | default: |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | return value; |
| 513 | } |
| 514 | |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 515 | static int |
| 516 | f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) |
| 517 | { |
| 518 | struct usb_composite_dev *cdev = f->config->cdev; |
| 519 | struct usb_request *req = cdev->req; |
| 520 | int value = -EOPNOTSUPP; |
| 521 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
| 522 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 523 | u16 w_length = le16_to_cpu(ctrl->wLength); |
| 524 | |
Laurent Pinchart | 0ad7252 | 2009-10-21 00:03:39 +0200 | [diff] [blame] | 525 | /* composite driver infrastructure handles everything; interface |
| 526 | * activation uses set_alt(). |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 527 | */ |
| 528 | switch (ctrl->bRequestType) { |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 529 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 530 | value = audio_set_intf_req(f, ctrl); |
| 531 | break; |
| 532 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 533 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 534 | value = audio_get_intf_req(f, ctrl); |
| 535 | break; |
| 536 | |
Laurent Pinchart | 0ad7252 | 2009-10-21 00:03:39 +0200 | [diff] [blame] | 537 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: |
| 538 | value = audio_set_endpoint_req(f, ctrl); |
| 539 | break; |
| 540 | |
| 541 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: |
| 542 | value = audio_get_endpoint_req(f, ctrl); |
| 543 | break; |
| 544 | |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 545 | default: |
| 546 | ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", |
| 547 | ctrl->bRequestType, ctrl->bRequest, |
| 548 | w_value, w_index, w_length); |
| 549 | } |
| 550 | |
| 551 | /* respond with data transfer or status phase? */ |
| 552 | if (value >= 0) { |
| 553 | DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", |
| 554 | ctrl->bRequestType, ctrl->bRequest, |
| 555 | w_value, w_index, w_length); |
| 556 | req->zero = 0; |
| 557 | req->length = value; |
| 558 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); |
| 559 | if (value < 0) |
| 560 | ERROR(cdev, "audio response on err %d\n", value); |
| 561 | } |
| 562 | |
| 563 | /* device either stalls (value < 0) or reports success */ |
| 564 | return value; |
| 565 | } |
| 566 | |
| 567 | static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
| 568 | { |
| 569 | struct f_audio *audio = func_to_audio(f); |
| 570 | struct usb_composite_dev *cdev = f->config->cdev; |
| 571 | struct usb_ep *out_ep = audio->out_ep; |
| 572 | struct usb_request *req; |
| 573 | int i = 0, err = 0; |
| 574 | |
| 575 | DBG(cdev, "intf %d, alt %d\n", intf, alt); |
| 576 | |
| 577 | if (intf == 1) { |
| 578 | if (alt == 1) { |
| 579 | usb_ep_enable(out_ep, audio->out_desc); |
| 580 | out_ep->driver_data = audio; |
| 581 | audio->copy_buf = f_audio_buffer_alloc(audio_buf_size); |
Julia Lawall | ff3b968 | 2009-12-09 14:23:32 +0100 | [diff] [blame] | 582 | if (IS_ERR(audio->copy_buf)) |
| 583 | return -ENOMEM; |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 584 | |
| 585 | /* |
| 586 | * allocate a bunch of read buffers |
| 587 | * and queue them all at once. |
| 588 | */ |
| 589 | for (i = 0; i < req_count && err == 0; i++) { |
| 590 | req = usb_ep_alloc_request(out_ep, GFP_ATOMIC); |
| 591 | if (req) { |
| 592 | req->buf = kzalloc(req_buf_size, |
| 593 | GFP_ATOMIC); |
| 594 | if (req->buf) { |
| 595 | req->length = req_buf_size; |
| 596 | req->context = audio; |
| 597 | req->complete = |
| 598 | f_audio_complete; |
| 599 | err = usb_ep_queue(out_ep, |
| 600 | req, GFP_ATOMIC); |
| 601 | if (err) |
| 602 | ERROR(cdev, |
| 603 | "%s queue req: %d\n", |
| 604 | out_ep->name, err); |
| 605 | } else |
| 606 | err = -ENOMEM; |
| 607 | } else |
| 608 | err = -ENOMEM; |
| 609 | } |
| 610 | |
| 611 | } else { |
| 612 | struct f_audio_buf *copy_buf = audio->copy_buf; |
| 613 | if (copy_buf) { |
| 614 | list_add_tail(©_buf->list, |
| 615 | &audio->play_queue); |
| 616 | schedule_work(&audio->playback_work); |
| 617 | } |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | return err; |
| 622 | } |
| 623 | |
| 624 | static void f_audio_disable(struct usb_function *f) |
| 625 | { |
| 626 | return; |
| 627 | } |
| 628 | |
| 629 | /*-------------------------------------------------------------------------*/ |
| 630 | |
| 631 | static void f_audio_build_desc(struct f_audio *audio) |
| 632 | { |
| 633 | struct gaudio *card = &audio->card; |
| 634 | u8 *sam_freq; |
| 635 | int rate; |
| 636 | |
| 637 | /* Set channel numbers */ |
| 638 | input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card); |
| 639 | as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card); |
| 640 | |
| 641 | /* Set sample rates */ |
| 642 | rate = u_audio_get_playback_rate(card); |
| 643 | sam_freq = as_type_i_desc.tSamFreq[0]; |
| 644 | memcpy(sam_freq, &rate, 3); |
| 645 | |
| 646 | /* Todo: Set Sample bits and other parameters */ |
| 647 | |
| 648 | return; |
| 649 | } |
| 650 | |
| 651 | /* audio function driver setup/binding */ |
| 652 | static int __init |
| 653 | f_audio_bind(struct usb_configuration *c, struct usb_function *f) |
| 654 | { |
| 655 | struct usb_composite_dev *cdev = c->cdev; |
| 656 | struct f_audio *audio = func_to_audio(f); |
| 657 | int status; |
| 658 | struct usb_ep *ep; |
| 659 | |
| 660 | f_audio_build_desc(audio); |
| 661 | |
| 662 | /* allocate instance-specific interface IDs, and patch descriptors */ |
| 663 | status = usb_interface_id(c, f); |
| 664 | if (status < 0) |
| 665 | goto fail; |
| 666 | ac_interface_desc.bInterfaceNumber = status; |
| 667 | |
| 668 | status = usb_interface_id(c, f); |
| 669 | if (status < 0) |
| 670 | goto fail; |
| 671 | as_interface_alt_0_desc.bInterfaceNumber = status; |
| 672 | as_interface_alt_1_desc.bInterfaceNumber = status; |
| 673 | |
| 674 | status = -ENODEV; |
| 675 | |
| 676 | /* allocate instance-specific endpoints */ |
| 677 | ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); |
| 678 | if (!ep) |
| 679 | goto fail; |
| 680 | audio->out_ep = ep; |
| 681 | ep->driver_data = cdev; /* claim */ |
| 682 | |
| 683 | status = -ENOMEM; |
| 684 | |
| 685 | /* supcard all relevant hardware speeds... we expect that when |
| 686 | * hardware is dual speed, all bulk-capable endpoints work at |
| 687 | * both speeds |
| 688 | */ |
| 689 | |
| 690 | /* copy descriptors, and track endpoint copies */ |
| 691 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
| 692 | c->highspeed = true; |
| 693 | f->hs_descriptors = usb_copy_descriptors(f_audio_desc); |
| 694 | } else |
| 695 | f->descriptors = usb_copy_descriptors(f_audio_desc); |
| 696 | |
| 697 | return 0; |
| 698 | |
| 699 | fail: |
| 700 | |
| 701 | return status; |
| 702 | } |
| 703 | |
| 704 | static void |
| 705 | f_audio_unbind(struct usb_configuration *c, struct usb_function *f) |
| 706 | { |
| 707 | struct f_audio *audio = func_to_audio(f); |
| 708 | |
| 709 | usb_free_descriptors(f->descriptors); |
| 710 | kfree(audio); |
| 711 | } |
| 712 | |
| 713 | /*-------------------------------------------------------------------------*/ |
| 714 | |
Laurent Pinchart | b95cd7e | 2009-06-21 23:21:55 +0200 | [diff] [blame] | 715 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) |
| 716 | { |
| 717 | con->data[cmd] = value; |
| 718 | |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) |
| 723 | { |
| 724 | return con->data[cmd]; |
| 725 | } |
| 726 | |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 727 | /* Todo: add more control selecotor dynamically */ |
| 728 | int __init control_selector_init(struct f_audio *audio) |
| 729 | { |
| 730 | INIT_LIST_HEAD(&audio->cs); |
| 731 | list_add(&feature_unit.list, &audio->cs); |
| 732 | |
| 733 | INIT_LIST_HEAD(&feature_unit.control); |
| 734 | list_add(&mute_control.list, &feature_unit.control); |
| 735 | list_add(&volume_control.list, &feature_unit.control); |
| 736 | |
Laurent Pinchart | 512ad27 | 2009-06-21 23:23:05 +0200 | [diff] [blame] | 737 | volume_control.data[UAC__CUR] = 0xffc0; |
| 738 | volume_control.data[UAC__MIN] = 0xe3a0; |
| 739 | volume_control.data[UAC__MAX] = 0xfff0; |
| 740 | volume_control.data[UAC__RES] = 0x0030; |
Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 741 | |
| 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | /** |
| 746 | * audio_bind_config - add USB audio fucntion to a configuration |
| 747 | * @c: the configuration to supcard the USB audio function |
| 748 | * Context: single threaded during gadget setup |
| 749 | * |
| 750 | * Returns zero on success, else negative errno. |
| 751 | */ |
| 752 | int __init audio_bind_config(struct usb_configuration *c) |
| 753 | { |
| 754 | struct f_audio *audio; |
| 755 | int status; |
| 756 | |
| 757 | /* allocate and initialize one new instance */ |
| 758 | audio = kzalloc(sizeof *audio, GFP_KERNEL); |
| 759 | if (!audio) |
| 760 | return -ENOMEM; |
| 761 | |
| 762 | audio->card.func.name = "g_audio"; |
| 763 | audio->card.gadget = c->cdev->gadget; |
| 764 | |
| 765 | INIT_LIST_HEAD(&audio->play_queue); |
| 766 | spin_lock_init(&audio->lock); |
| 767 | |
| 768 | /* set up ASLA audio devices */ |
| 769 | status = gaudio_setup(&audio->card); |
| 770 | if (status < 0) |
| 771 | goto setup_fail; |
| 772 | |
| 773 | audio->card.func.strings = audio_strings; |
| 774 | audio->card.func.bind = f_audio_bind; |
| 775 | audio->card.func.unbind = f_audio_unbind; |
| 776 | audio->card.func.set_alt = f_audio_set_alt; |
| 777 | audio->card.func.setup = f_audio_setup; |
| 778 | audio->card.func.disable = f_audio_disable; |
| 779 | audio->out_desc = &as_out_ep_desc; |
| 780 | |
| 781 | control_selector_init(audio); |
| 782 | |
| 783 | INIT_WORK(&audio->playback_work, f_audio_playback_work); |
| 784 | |
| 785 | status = usb_add_function(c, &audio->card.func); |
| 786 | if (status) |
| 787 | goto add_fail; |
| 788 | |
| 789 | INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n", |
| 790 | audio_buf_size, req_buf_size, req_count); |
| 791 | |
| 792 | return status; |
| 793 | |
| 794 | add_fail: |
| 795 | gaudio_cleanup(&audio->card); |
| 796 | setup_fail: |
| 797 | kfree(audio); |
| 798 | return status; |
| 799 | } |